Are minnows okay once a week?

I am trying to come up with ideas for feeders for my african bullfrog and pacman.They are growing and crickets are kinda small. I am working on a dubia colony but cant cull to many yet if I want more in the future so Ive only been feeding these once in awhile more like a treat.
Night crawlers(calcium dusted) mostly and once a week fuzzy mice and superworms are what they are getting right now.
This is about all I can get locally.In summer I can get feeder crayfish as well but not right now.

Is there a feeding schedule I should use? Ive been feeding every other day.
Although the pacman will skip meals occasionally, he has always been a hard one to get interested in food.I have to tease him and if he misses he gives up.