Pumping

Those of you who are pumping how often do you pump? And how much do you get?

My 2 year old daughter has been wanting to feed her baby brother so i pumped for the first time yesterday. I pumped one time for 10 minutes and got 4.5oz. Today I also pumped one time for 4 minutes (i had someone show up so I had to cut it short) & I got 4oz. I pumped for 5 more minutes a little later to finish up my pump session that was cut short and got 3oz so I had 7oz total today. I was pretty proud because with my daughter I didn't even get half an ounce when pumping.