Honestly it can depend on what mood I am in, I can leve it alone for months with the same outfit, then I might change her ten times in one day or everyday.

She just has to suffer through it!!!

Pretty frequently when I'm at home! Sometimes multiple times a day, sometimes a couple times a week. Less often when I'm out. It doesn't really have a fixed appearance in my mind. ^_^

Eta: Ahahaha, I finally found a use for these Ganguro extensions. I haven't gotten any wigs that looked even remotely good with the shape and color until now. (YMMV, of course. )

depends on avatar items i get from level ups of my wild knuffels and the amount of and I have to get new items

.. not very often.. only when I get a new item which I was looking for

I can leave it untouched for months and then change it twice in a week. Consistency is a trait for other people.

rarely... I don't think I've changed since last year XD

Sometimes every day, sometimes once a week. If I get a new item, I'll probably change my avatar soon after getting it.

Same here... I often change mine every day, but if I like it, I may keep it a little longer... But when I get a new item I'll usually wear it right after! (even if sometimes it's only for half a day)

It's very different how often i change my avatar.
But mostly i don't change for at least one month.