I've only rescheduled for work, illness, or vacation. I usually have to reschedule once every 6 weeks or so (usually work). I rarely skip a session altogether; I usually just switch my time to another day that week. T also occasionally reschedules as well, usually for a conference, family situation, or vacation. I've never had the desire not to go to T for anxiety reasons. I'm on the other end of the spectrum; I have to fight the urge to ask for additional sessions. I would probably go to T several times a week if that we're an option.