I want to refresh an extract only at 4 PM and 9 PM . Is it possible to manage this in the existing schedules? Or, Can I customize the frequency of the schedule? Thank you advance.

Great. If that addresses your question, would you be so kind as to mark my response as the "best" answer? That will close the thread and, more importantly, will cause that response to bubble to the top, making it easier for others to find answers to similar questions in the future. Thanks!