>>1064684Probably one per day. Conventional wisdom is that pipes need to rest a little bit after being smoked repeatedly for a day or so. I don't think that's necessarily true-you can certainly smoke most decent quality pipes day in and day out for years with no ill effects given regular maintenance-but it's definitely a nice excuse to get more pipes.
Some of the high end brands make 7-day sets too, like pic related from Dunhill.