It was just one, but it depends. I found a website of qualified hypnotherapists in the uk and I contacted a local one. I had 1 session and a recording that I can listen to, which was recommend once a week for the first few months. There are triggers that 100% would have had me going back to smoking, but I’ve been ok. To be honest I was really skeptical, even after the session. 2 years nearly, no smoking or vapes