With DD1, AF returned around 10.5-11 months. She went down to 4 feeds around 10 weeks (slept through from 9 weeks!) and due to lots of BF issues, she was comp fed with formula. She weaned from the breast at 11.5 months. We had a good run I wasn't on the pill. My cycles were pretty regular from day dot but they've always been pretty regular anyway.

DD2 is 6 months on the 18th June and feeds 5-6 times a day. She's exclusively BF, I'm not on the pill and no AF yet

It's different for every woman and every pregnancy/baby. There is no rhyme or reason, AF seems to have a mind of her own