A dhimmi woman who is divorced or widowed and accepts Islam during the waiting period: how long is her waiting period?

Ziyad bin Abd al-Rahman (may Allah have mercy on him) said: I asked al-Sha'bi (may Allah have mercy on him): If a dhimmi woman is divorced and becomes Muslim during her waiting period, how long a waiting period does she observe? He said: Once she has accepted Islam, the rulings of Muslim women apply to her.

Abu Hurrah said: Al-Hasan (al-Basri) was asked: If a Christian woman who is married to a Christian man accepts Islam, will the two of them be separated? He said: Yes; she must observe a waiting period: three menstrual periods or three months.

Ata (may Allah have mercy on him) was asked: If the husband of a Christian woman dies and then she accepts Islam, how long a waiting period does she observe? He said: Four months and ten days.