There are two categories of multitool that I tend to use differently, although with some overlap. Of these, I spend more time with Leathermen pliers- based tools than Vic SAKs, although I like those for some purposes. Over years, all the implements on my Swisschamp have been used, except the small backspring mounted screwdriver, knife and scissors probably the most. I really couldn't say how often any of the the tool set got used, that varied over the years with lifestyle and circumstances.
All the implements on my Leatherman Charge get used, some of them daily, although not always for their designated purposes. Pliers, of course, PE edge blade and combo bottle/can opener probably get equal time as most used, followed by, in (unreliable) order; large fixed screwdriver, ph regular bit, scissors, file, serrated blade, saw, ruler and way back there bringing up the rear, that wretched little "eyeglass" bit, which has been used maybe three times in 3 years, only once doing any good :grumpy: . I'd gladly trade it for an awl, but in the meanwhile I use a mod that fits the quick release slot. Good enough.