Hey, So Shandy my Whites Tree Frog is pretty greedy, but I do limit his food

The problem is; I suck at breeding crickets, even when they have their own big container after a week it smells horrid and every cricket is dead, I was wondering if I could buy two boxes of crickets for Shandy and freeze one box but keep the others in their tub? Would I just put the crickets in a tub and freeze them? How long can they stay frozen for (Wondering if they ever go off from being frozen for weeks?) Also would I be able to take them out and put them in a cup of warm water to defrost then feed them? Thanks in advance
