Breastmilk

I know for thawed milk it can only be left out for 2 hours but is that the same with milk that’s just in the fridge. Like as where freshly pump it can be out for 4 hours. like say I pump 4oz, and I put those oz in the fridge for later. Then later I just want to take it out the fridge to be ready for the baby, can that 4oz be out for 4 hours or do I have to treat it as if it was thawed milk? I looked everywhere but I can’t find the answer to it