What is meant by the beginning of the time for prayer
Question

                I am a young woman and I experience discharges all the time. I used to pray and read Qur’aan until the time for the next obligatory prayer came, then I read a fatwa which said that a woman can read Qur’aan and pray naafil prayers but this should be at the beginning of the time until the time for the next prayer begins. We know that the beginning of the time is when the muezzin gives the call to prayer, but when is the beginning of the time for the next prayer – is it one quarter of an hour before the adhaan or less?.
Praise be to Allah.
    Firstly: 

    Continuous discharge comes under the heading of continual 
    impurity; it is like istihaadah (non-menstrual vaginal bleeding), urinary 
    incontinence or continual passing of wind. The one who is affected by this 
    discharges has to do wudoo’ at the time of every prayer, then pray as much 
    as she wants of naafil prayers, and she may touch the Mus-haf with that 
    wudoo’, until the time for the next prayer begins. 

    With regard to reciting Qur’aan without touching the Mus-haf, 
    wudoo’ is not required for that. The person who is impure in the sense of 
    minor impurity may recite Qur’aan by heart, or recite from the Mus’haf if he 
    holds it with a barrier such as gloves and the like. For the ruling on 
    discharges please see question no. 
    50404. 

    Secondly: 

    What is meant by the beginning of the time is the time when 
    the adhaan is given for the prayer, according to the timing in each land. 

    Islam has stipulated the timings for the beginning and end of 
    each prayer. You will find details of this in the answer to question no.
    9940. 

    If the time for ‘Asr, for example, starts at 3 p.m., then 
    when the woman who is experiencing discharges does wudoo’ for Zuhr, she may 
    touch the Mus-haf, circumambulate the Ka’bah and offer as many naafil 
    prayers as she wants until 3 p.m., when the adhaan is given for ‘Asr prayer, 
    so long as she does not break her wudoo’ in any other way apart from 
    discharges during that time, such as by urinating and other things that are 
    known to break wudoo’, because she is only excused for the discharge because 
    it is continuous and it is hard to stop it. 

    And Allaah knows best.