I voted around 2 months.
First time, EBF twins, it was closer to 3 months.
Second time, EBF singleton, it was 8 weeks.
Third time, EBF singleton, it was 9 weeks.
Needless to say, I was not happy any of the three times.
For whatever reason, I *only* have regular AF when I'm exclusively nursing. Go figure. I do have PCOS, so maybe that has something to do with it.