whats the actual digging cooldown for treasure in savannah?

[craggy ore]

im confused, it says 1 day, do they mean a real day outside the game, or is it something else and they forgot to change the description?

[spring frigate]

It's one in-game day.

[craggy ore]

but ive tried digging the next ingame day, and it doesnt let me, even 2 days.

and yes, past the time i digged