Hmmmm, just use? Well, I use it when someone calls me or I call someone. I use only about 3 times a day (or less) to check email. And I use it 3 times a day or less to do other things (play games, use the nav feature). And yes I know, I'm NOT typical, although I'm MUCH older than most women on this site.
I haven't even tried counting, lol. I read on it, play games, phone calls, text, use the internet, and various other things. It depends on the day though. Sometimes it's less than 5, sometimes it's more than 10.