Do you discount bulk sessions based on frequency per week or duration of package?

I charge based on the program. Some clients I meet with once a month for 90 minutes. Others I see 2 to 3 times a week for an hour each time.
I have people purchase up front. This allows me more leverage with the cancellation policy. I am somewhat flexible with the policy, but I’ve had to enforce it to get people to be more consistent. The policy is as much for me and the client.