Depends, really. Sometimes, she'll nurse for just 5-15 minutes on one side. Sometimes, she will nurse for another 5-10 on the other. She pops herself off the first breast when she is done, and I always offer the other breast. Sometimes she takes it, othertimes she does not. Unless we are going through a growth spurt (and we're due for the 6 week biggie in 2 weeks ...), she nurses every 2-3 hours during the day, every 2-4 at night.