Question:
What is Qiyaam-ul-Layl, Tahajjud, Chaast and Awaabeen?
Answer:
Qiyamul-layl and tahajjud are the same.
Chasht is the nafl prayed at forenoon – roughly 11 am; it is mustahabb to pray 8 rakats.
Awwabeen is the nafl after Maghrib; 6 rakats are mustahabb.