Current T when she worked for a big organization never had set days or times. It was sort of a free for all. The receptionists would book her clients whenever. So my appointments were all over the place. Eventually I got to the point where I would make appointments a month in advance so I could at least get on the schedule. Now that she works for herself, I have a set date and time. Every other Saturday at 11 AM. She's really flexible if I need an emergency appointment though.