Two times a day is good for a 5 inch fish thats still growing. You could feed more. The problem with a question like this and my answer is it doesnt take into account what you are feeding and how much.
Discus can be tough to get on pellets. Your best bet is try a few and see what they will eat.
I dont feed anything frozen. Just freeze dried , pellets, and flakes(juveniles).In fact, does anybody use a diet of entirely non-frozen food? Thanks for the help
hth,
Al