I must smoke about several bowls a day.
I smoke my pipe pretty much all day long with perhaps an hour or so break between light ups.
What I usually do is to light the pipe and smoke it until it goes out, then I'll put it down for awhile and light up again in about a half hour or so....if the pipe doesn't go out, I'll of course finish the bowl, then refill about an hour or so later, I've never timed it, and I have no desire to time it either so this is of course only an estimation.
I'm retired, and live alone so I just enjoy my life, and my pipe.