He has two wives and he is not dividing his time among them fairly
Question

                Is it obligatory for a husband with two wives to designate specified days for each wife.  Also, is it permissable that he share the days between the two.  My husband presently has no designated days for us.  He comes to my home when he has finish his rounds at my co-wives house.  He then comes to my home to go to bed.  This arrangement is not acceptable to me.  Were on the brink of divorce.
Praise be to Allah. 
          The one who has more than one wife has to treat all his 
          wives fairly. One of the matters in which he must be fair is the division 
          of his time, i.e., he must give each wife a day and a night, and he 
          must stay with her on that night. 
 
          Al-Shaafa’i (may Allaah have mercy on him) said: “The 
          Sunnah of the Messenger of Allaah 
          
          (peace and blessings of Allaah be upon him) and the opinion of the majority 
          of Muslim scholars indicate that a man has to divide his days and nights 
          between his wives [giving each a full day and night], and that he has 
          to be fair in doing so. (al-Umm, 5/158). And he said: I do not 
          know of any (scholarly) disagreement with the view that a man must share 
          his time among his wives and do so fairly. (al-Umm, 5/280). 
 
          Al-Baghawi (may Allaah have mercy on him) said: If a 
          man has more than one wife, he has to treat them equally, if they are 
          free [i.e., not slaves], whether they are Muslims or from among the 
          People of the Book [i.e., Jewish or Christian]. If he does not treat 
          them equally, then he has disobeyed Allaah and he has to make it up 
          to the one whom he wronged. It was narrated from Abu Hurayrah that the 
          Prophet 
          
          (peace and blessings of Allaah be upon him) said: “Whoever has two wives 
          and leans towards (i.e. favours) one of them (over the other), will 
          come on the Day of Resurrection with half of his body leaning.” However 
          there is some dispute concerning its isnaad. (Narrated by Abu Dawood, 
          2/242; al-Tirmidhi, 3/447; al-Nasaa’i, 7/64; Ibn Maajah, 1/633; classed 
          as saheeh by al-Haafiz in Buloogh al-Maraam, 3/310, and al-Albaani 
          in Irwaa’ al-Ghaleel, 7/80). 
 
          What is meant by this “leaning” is favouring in terms 
          of actions; a man will not be taken to task for the inclination of his 
          heart if he treats (his wives) equally in practical terms. Allaah says 
          (interpretation of the meaning): 
 
          “You will never be able to do perfect justice between 
          wives even if it is your ardent desire, so do not incline too much to 
          one of them…”
 
          [al-Nisaa’ 4:129]
 
          What this means is that you will never be able to treat 
          them equally in your heart, so do not incline too much towards one of 
          them, i.e., do not make your actions follow your whims and desires. 
          
 
          (Sharh al-Sunnah, 9/150-151) 
 
          Ibn Hazam (may Allaah have mercy on him) said: Treating 
          co-wives equally is obligatory, most of all sharing one’s nights between 
          them. 
 
          (al-Muhalla, 9/175) 
 
          Shaykh al-Islam Ibn Taymiyah (may Allaah have mercy on 
          him) said: He has to treat his wives fairly according to the consensus 
          of the Muslims. In the four Sunans it was narrated from Abu Hurayrah 
          that the Prophet 
          
          (peace and blessings of Allaah be upon him) said: “Whoever has two wives…” 
          He has to be fair in his division of time between them. So if he stays 
          with one of them for one night, or two or three, he should stay with 
          the other for the same number of nights, and he should not give preference 
          to one of them in his sharing of his time.
 
          (Majmoo’ al-Fataawa, 32/269) 
 
          Al-‘Ayni said, commenting on the hadeeth, “Whoever has 
          two wives…”: It was said that what was meant was that half of his body 
          would be leaning in a real sense, or that he would have no acceptable 
          excuse for favouring one wife over the other. The apparent meaning is 
          that this is in the real sense. This is indicated by the report of Abu 
          Dawood, “with half of his body leaning.” The punishment fits the crime, 
          because he did not treat them fairly or he deviated from what is right. 
          Because of his being unfair and favouring one of them, his punishment 
          is that he will come before the witnesses on the Day of Resurrection 
          with one half of his body leaning.
 
          (‘Umdat al-Qaari’, 20/199. See also al-Mabsoot, 
          5/217). 
 
          Al-Shawkaani also understood this to mean that it is 
          obligatory (to treat co-wives fairly). See al-Sayl al-Jiwaar, 
          2/301; Nayl al-Awtaar, 6/216 
 
          Ibn Qudaamah al-Maqdisi (may Allaah have mercy on him) 
          said: We know of no dispute among the scholars concerning the fact that 
          it is obligatory to treat co-wives equally when sharing one’s time between 
          them. Allaah says (interpretation of the meaning): “and 
          live with them honourably” [al-Nisaa’ 4:19], 
          but favouring one of them is not honourable.
 
          Al-Mughni, 8/138 
 
          This husband has to fear Allaah and be fair in his division 
          of his time. The wife has to tell him of the ruling of sharee’ah concerning 
          what he is doing, and of the warning of mistreatment. She should remind 
          him of Allaah and the Hereafter, so that he will check himself and be 
          fair in his division of time. This is better than separating, in sha 
          Allah. And Allaah knows best.