Ata, Saeed, and Ikrimah (may Allah have mercy on them) used to say regarding the mustahadah (a woman with non-menstrual bleeding) that she should perform ghusl once daily for the first prayer (Dhuhr) and 'Asr, and after performing ghusl once for Maghrib and 'Isha, she should pray both prayers, and for the Fajr prayer she should perform ghusl once.