For those of you bottle feeding how much was ur baby drinking at 8wks? All these week I've been…

For those of you bottle feeding how much was ur baby drinking at 8wks? All these week I've been pumping about 2-4oz each time. Olivia just had a full 2oz in the bottle for the very first time but then took the breast when the bottle was finished. I'm guessing she was still hungry. I don't know how much to freeze each time,shall I try and do 4oz,more or less? This is so confusing