At the moment, I'm only having about 1 bowl per day. I have a corncob that I am not a fan of, and I have the one briar. The corncob I got for if I happen to want a second bowl because it was inexpensive, just to have a second pipe until I can afford another briar (and come across one that speaks to me, whether new or estate).
But I will load and smoke a bowl in one sitting, usually with my mid-afternoon coffee. If I had more briars/pipes that I enjoyed, I might be doing 2-3 bowls per day (I want my pipes to have 24 hours between smokes).
And if I had enough pipes, I might lose track of the bowls per day as I might prefer to smoke only a little at a time but multiple times per day (say, smoking for 5-10 minutes 15-20 times per day instead of smoking for 45-90 minutes 1-2 times per day). Or I might even prefer a few all day smokes with one or two long sessions thrown in.