One session meaning one time. Both of us think it would be valuable to do, but on the timescale of like... once/year or once every few years. But there are people who do it once/month for several months if they have a lot of specific things to work through. Our guide actually works with a number of 'regular' therapists, and they pass clients on to him if they think a guided session is the right move. He says therapists will sometimes say, "please take this person on a journey once / month for the next 3 months" (or something along those lines)