Does anyone have a chart on how often to feed? And how much per every feeding? Right now my baby is…

Does anyone have a chart on how often to feed? And how much per every feeding? Right now my baby is going between breast milk and enfamil because of latching issues. Once the latching issue works it self out we will be strictly on my milk. Any advice mamas? I feel like I'm over feeding him the hospital said to feed him 2oz of enfamil ever 3-4 hours. And if he latches until he pulls away and every 2 hours after breast milk.