To answer that I'd have to be good at teaching. Or giving advice. I'm good at neither of those

That, my friend, is called tweening. I don't use a specific frame rate most of the time. Some frames will have different speeds, some sections will stay the same for a bit, so on and so forth. However, to answer your question, it's usually a mix of 70, 80, 90, 100, 110, 150 and 300

"I'm not good at teaching" Teaches anyways