[Ferkilort]

The time for Ishraq is right after sunrise and the time for Duha is after that, later on anytime in the morning. it's mentioned in Beheshti Zewar I think. However, according to the majority of opinions, including those of many Hanafi scholars, Ishraq and Duha both refer to the same prayer, i.e they're the same thing. That would indicate that if a person was to perform them as two separate prayers there are no real hard and fast rules about the exact time frame to perform them in.