If the goal is to make meaningful improvements from say a 7-10 handicap level, how often should middle aged golfers take lessons?

The common wisdom is take lessons in the off-season or when one can’t self diagnose problems. However, I see juniors taking 3-4 lessons a month and they are much better than us already! When I used to play tennis I took a lesson or clinic 3-4 times a month…sometimes a lesson and a clinic each week. Yet here I am trying to get better at golf without lessons?!

Any thoughts about taking regular lessons to get better and to maintain a certain level?