Plays usually rehearse two days per week from 4:30pm until 6:00pm (either Monday and Wednesday or Tuesday and Thursday).
Musicals will usually rehearse three to four days per week from 4:30pm until 6:00pm.  The director determines which days rehearsals will be held.
Actors with larger roles will be scheduled for most rehearsals. Actors with smaller roles will typically have some days off early in the rehearsal process. As the performance dates approach, every actor will be required to attend every rehearsal. During production week (the week directly before the show opens), rehearsals are held every day from 6:00pm until roughly 9:00pm.