My ds was like your dd, eating frequently during the day and sleeping all night. It was wonderful while it lasted!
I think some babies have a longer schedule when they are tiny because they are still in that newborn sleepy phase. Once they 'wake up' to the world they don't sleep as well. As they get older, around 4-6 months, most breastfed babies get on a 3-4 hr EASY, determined by the amount of time they can stay awake/nap.
Enjoy some full nights of sleep!