Usually for personal use, 60-90 min one time, one time one day, 5 days one week. What you will be able to notice is whether you are continuing to get improvements. A clinical study on 1730 subjects shows the need for around 15 sessions for acute injuries and 40 for chronic ones. If you saw results during the first 40 sessions, do another 40. If improvements continue, do another 40. Etc. You are a better judge of the number of sessions needed than any Doctor.