I once smoked a pound a week. That's when I was editor of a small daily newspaper and worked monster hours. You read that right. A pound. I never had a pipe out of my mouth, except when eating and sleeping.
After that job expired, I cut back to maybe 10 bowls a day. Then I stopped smoking for 20 years or so. About 15 years ago, I found my old pipes packed away in a box. I cleaned them up, and bought some SWR. I haven't looked back since.
The only change is now I smoke one to three bowls a day, but not every day. I do not smoke in the house, but outside and right now it is cold. So, I don't get a chance to smoke, since I refuse to freeze when trying to enjoy my pipe.
So, to end this long story:1-3 bowls per days; but most days an average of one.