If a woman forgot yaleh v’yavo in mincha and she regularly davens three times a day, should she daven maariv twice?
Answer:
Yes, if she davens three times daily she should certainly daven maariv twice, and she is even obligated to do so.
If she wouldn’t daven maariv daily, it seems that this will not be an obligation (see sources noted below).
Best wishes.
Sources:
See Mishnah Berurah 263:42; see also Halichos Shlomo, Tefillah 13 note 10. See Halichos Bas Yisrael 2:20 and Ishei Yisrael 30 note 6.