when i shoot TF, the model and I sign an agreement. one of the details in the agreement is delivery of photo/s. (date & delivery method)
it is important to discuss details prior to shooting and have an agreement signed so that both parties are on the same page.

It depends with whom you shoot. Even if you have agreed a deadline or signed a Release Form stating when you'll get the images, you may not get them by then or at all in some cases.

Personally I start delivering (via email) processed images within 48hrs of the shoot finishing. usually every shot I intend to release has been sent within 7-10 days. That can be as many as 10-15 images or as few as 3-5, depending on the shoot.

The trick is to check references well in advance and contact as many models as possible and ask that specific question. Don't be in a rush to shoot TF, take your time, check that everything adds up and be selective.

BTW there are literally thousands of threads on MM about this subject.

My suggestion is to talk about the deliver time frame prior to agreeing to shoot.

If you really want to know the average, do a search on this topic as there have been many threads, then do the math.

I usually take 2-4 weeks.