How much breast milk?

Hi everyone! Can anyone tell me how many oz your baby eats in 24hrs if you are expressing your breast milk and feeding with a bottle?

I’m in the process of expressing and freezing for when I’m away for a couple of days at the end of May. As of this morning I have just counted that I have 29.5oz in the freezer. I have been trying to express every morning and will get between 1-3oz. I’m just trying to work out how much (roughly) I should aim to have? We’re also going away for about 8-10 hours in the middle of April so I suppose that will give me an indication as to how much my wee one will eat in that time.

Any advice is much appreciated ☺️

(He will be 5 and a half months by that time).