my 36 month old is nursing infrequently-- 2-4 times/week. BooBah, my 16 month old, has totally weaned.
BeanBean says that there is no milk when he nurses, but he really doesn't care-- he's always been strongly attached to his nursies. BooBah was never a comfort nurser, she nursed for food and when the food was gone, she wasn't interested. Now when I ask her if she wants to nurse she says, "no" and walks away.
It's a total change from BeanBean, who always wanted to nurse. I can remember him holding a bottle of soymilk right next to my breast and trying to get both nipples into his mouth at the same time, poor kid. If I could have afforded a SNS, I'd have bought one for him even though he was older. He just physically and emotionally needed to nurse, and I felt wretched when he didn't get much milk.
BooBah is all good, though. She's digesting her food (has been for some time, her brother was fully 18 months old before this happened), growing, and happy with things the way that they are. She likes to snuggle with me, but she's just not interested in nursing.