I'm just shy of 2 years.
My surgeon's instructions were 2-3 x per week at 6 months after (I was still going mostly daily simply for fun :-))
After 9 months she calls for 1-2 x weekly and I certainly do that. I'm neither gaining nor losing depth, I almost never use a dilator, far prefer sex toys. I don't often even use the larger ones as when either I or a partner wants to penetrate me with either many fingers or a toy with more girth, I find I open easily, so long as I'm aroused. My most recent partner was quite certain she'd be able to fist me if we chose to do so.
So basically once I got to over a year, it's been about keeping an eye on things and having sex when I'm in the mood .. if I'm not in the mood for a week, I find the time to get myself there .. I don't ever want to dilate without enjoying it, that would be painful emotionally.