Be ready for more than 2 months... For example, I'll use myself:
1st Interview PM&R - October 7th
Last Interview PM&R - Next week (although I canceled it due to pre-match)
They were really scattered all throughout that time. You can try to lump them, but no guarantees. Some programs offer them early, even if for later dates, while some offers don't come until later on. Not to scare you, but just wanted to give you a heads up!