for young ones, under 6 months, I give them as much as they will eat within 5 minutes, 2 or three times a day. That could be perhaps 10 or 12 small crickets plus a couple small larva (butterworm, superworm) or other.
From 6 months to approaching a year, it might be a bit less, perhaps 6 crickets (or equiv) a day
At one year they are basically adult size (although they do continue to grow slowly) and they need only 1-3 cricket sized insects a day. You could feed daily or every other day, or even every third day (adjusting the amount per feed accordingly). With females (if you are not breeding her) you do not want to overfeed as it can result in unnecessary big egg production.