Breast feeding a lot

My LO is 4 months today, I breastfeed probably every hour and a half, she doesn’t drink a lot maybe 2 oz she only sucks for maybe 5 minutes if that and then is done, so she eats frequently. Does anyone else have this happening? Not that I mind I just curious. She naps every hour and a half and likes milk right before her nap and sometimes during so I think that’s why she eats so frequently but not a lot of milk. She is a big girl so I’m not concerned with her getting enough, like I said curious is others have babies like this.