You are making your question very complicated. Every bakery has its own way to freeze cakes and that is the normal procedure. Some bakers even use special equipments called electric cake frosters or the electric oven is used for freezing them. I do not know what brand cake you are looking for but if you can get a manual from this website, it should give you all information about how to bake and freeze cakes in different ways. There is no particular time when bakeries must store their cakes since there are many varieties of cakes available in the market like red velvet, chocolate, chiffon, vanilla etc so everyone stores them in their individual way which varies from bakery to bakery and some of them need special equipments like fridge or freezer so I do not think those specific questions exist because bakeries may store the cake differently by which we cannot determine what’s inside a specific refrigerator or freezer.