I'm assuming we are talking about a dart frog?
Calcium dusting needs to be done with every feeding.
If your dart frog is juvenile, this should be done daily.

May I suggest you feed this frog daily /Ca dust daily/ and supplement w/ Vit A (dusted flies) 2 twice per month.

Repashy makes a Vit A supplement

Extra feeder: springtails should be added to the enclosure frequently enough to always be visible where the wood meets the substrate.

Josh's frogs makes great / inexpensive/ springtail cultures that are easily maintained in charcoal. If you decide to purchase there,
divide the culture into three when you get it. Consider purchasing his springtail food as well ?