Sometimes toddlers nurse so much when they are bored/insecure/just want your attention. For example. she might have wanted to nurse so much during the TV show, as she wanted your attention to be on HER, instead of the TV. Or sometimes during playgroup, especially if it was a large group, she might have been unsure of how to play/interact with the other kids or just feeling a little unsure in a large group. Sometimes nursing can take the place of other meaningful mother/todder interaction (like reading books, playing games., etc. ).
My almost 2 year old nurses a lot too...but I defintely see a difference in the amount of nursing, if I am able to spend more focused time on her (reading books, playing) Or, at playgroup, sometimes if I just take a little time to show her the toys, help her play and play with her, she nurses just a bit less. Making sure she gets lots of outside playtime and sunshine also seems to help keep the nursing down to a more managable time (insteasd of near constantly). It just puts everyone in a better mood, and she is less clingy, less bored, happier, etc.
I am certainly not trying to wean or anything, but I do try to make sure that nursing is balanced into our day with other meaningful interactions and fun things to do, so it just one thing we do, instead of something she wants to do almost all the time.