How much pumped breast milk should a 2 week old eat in a feeding? I have to leave Violet with her…

How much pumped breast milk should a 2 week old eat in a feeding? I have to leave Violet with her dad for about two hours tomorrow for an appointment for blood work to be done and then afterwards to get a haircut. I'm trying to figure out how much milk I need to thaw to leave with him for when she eats but I never used frozen breast milk with Henry so I'm not sure how much she should eat since he was a boob only baby. She's under 6lbs if that makes a difference.