I pretty much usually sign in and leave a window up, even if I don't do anything. Sometimes I'll pop on or off if I have a little time inbetween doing others things (like working). So, I'll say "every day" - although I sometimes don't do much of anything for a few days.
I always check my traffic. I usually see if there's anything at all interesting in the forums. If I see that there are comments I'll either respond to them or at least keep in mind that I need to come back to do that. If it turns out there wasn't much of anything in the forums I'll sometimes come here, to Answers, and see if anything catches my eye.
Everything above is my "non-Hub-writing" type of activity. If I happen to see a Hub that catches my eye I may read that.
Then, if I have a chunk of time (and I'm in the mood), I'll write a Hub. Sometimes I'll write two within, say, two days but then not write another one for a few weeks.
Basically, I use this site to write Hubs here and there; but then I use it for the things mentioned above, as a way of having some other insignificant little things to do as a way of having something "light" to do between work or other things I do online.
So, yes - frequent user.