How many treatments and how far apart you get them is determined by what you are trying to treat.  for long term benefits on wrinkles this superficial peel is not the treatment of choice by any means.  For some superficial textural changes and mild pigmentation issues this can do pretty well.  You would likely need multiple treatments spaced 2-4 weeks apart. Your doctor needs to match the treatment to the problem.  some things just arent worth doing while others are overkill so find a board-certified dermatologist who knows all about the skin, skin diseases and changes  and has training in cosmetic applications.  Good luck.