Husband and wife for hundreds of times of consecutive rebirth. How? In Theravada Buddhism, once a person dies he or she will be reborn immediately. Each person dies at a different time. How is it possible for a husband and a wife to meet again in the future consecutively for hundreds of times?
Husband and wife for hundreds of times of consecutive rebirth. How?


In AN 4:55 - The Same in Living, the Buddha visits a married couple in their residence. Here he is given alms food whereafter he gives a teaching to the householders. 

Both householdes, Nakulapitā and Nakulamātā, asks the Buddha how they can remain together in this life and meet and be together in future lives as well.

The Buddha teaches: “Householders, if both husband and wife wish to see one another not only in this present life but also in future lives, they should have the same faith, the same virtuous behavior, the same generosity, and the same wisdom. Then they will see one another not only in this present life but also in future lives.”

Below is the quoted sutta.


  
  The Same in Living (1)
  
  
  On one occasion the Blessed One was dwelling among the Bhaggas in Suṃsumāragira in the deer park at Bhesakalā Grove. Then, in the morning, the Blessed One dressed, took his bowl and robe, and went to the residence of the householder Nakulapitā, where he sat down in the prepared seat. Then the householder Nakulapitā and the housewife Nakulamātā approached the Blessed One, paid homage to him, and sat down to one side. The householder Nakulapitā then said to the Blessed One:
  
  “Bhante, since I was young, when the young girl Nakulamātā was given to me in marriage, I do not recall ever transgressing against her even in thought, much less by deed. We wish, Bhante, to see one another not only in this present life but also in future lives.”
  
  The housewife Nakulamātā in turn said to the Blessed One: “Bhante, since I was a young girl given to the young householder Nakulapitā in marriage, I do not recall ever transgressing against him even in thought, much less by deed. We wish, Bhante, to see one another not only in this present life but also in future lives.”
  
  “Householders, if both husband and wife wish to see one another not only in this present life but also in future lives, they should have the same faith, the same virtuous behavior, the same generosity, and the same wisdom. Then they will see one another not only in this present life but also in future lives.”
  
  Both husband and wife are endowed with faith,
  charitable and self-controlled,
  living their lives righteously,
  addressing each other with pleasant words,
  
  Then many benefits accrue to them
  and they dwell at ease.
  Their enemies are saddened
  when both are the same in virtue.
  
  Having practiced the Dhamma here,
  the same in virtuous behavior and observances,
  delighting after death in a deva world,
  they rejoice, enjoying sensual pleasures.