I seem to use one maybe 2 during the week.
When I have a big delivery at work and need to break down boxes I'll pick a newly sharpened one, or maybe a beater.
On the weekend I'll usually have one of 2 or 3 beater/garage/yard knives on me and then a nicer one when I go out.
So, I'll say I use 3-4 knives a week.
How many you go through?
I pick my EDC for the week and carry something different for Saturday and Sunday.

