I'm all over the map in this regard, due to the number of knives I carry at once.
My traditionals are typically carried purely for my enjoyment. Many days they remain in my pocket, sometimes I choose to use them over my modern folder just because I feel like it, and sometimes their main use is simply for me to take them out and admire them.
When it comes to SAK's and my Swisstool, their use is to be there when the need arises, not so much that I need to use them every day.
I use my modern folder fairly often. I'd say I have the need to cut at least something every day, even if it's just packaging. The thing is, my activities vary from time to time. I may go a couple of weeks when my knife is seeing heavy use all day long, or I may go a week barely using it at all. I'll even make a startling admission, when it comes to packages with paper tape (like Amazon), I often leave my knife in my pocket and just tear it open with my hands
Honestly, when I think about it, my flashlight is equally as essential as my knife. Even in the daytime, there's always the back of a cabinet, or underneath something, in the shadows, etc. I'd say I use it for something or another pretty much every day as well. I'm just as baffled by people who don't find the need to carry a flashlight as I am those who don't carry a knife.