The waiting period of a divorced woman whose menstruation is irregular

Question:
Honorable Shaykh, if a woman is divorced and her menstruation is irregular, sometimes she goes four months without it, and other times it comes after two months, so what is the waiting period for this woman?

Answer:
As long as there is menstruation, it is necessary for three periods to pass, whether they are regular or irregular; three periods must pass, . So as long as menstruation exists, even if it is delayed, she does not complete the waiting period until she has three periods. However, if menstruation has ceased and will not return, and she is either very young or has reached the age of menopause, then she waits for three months, .