How do I run a loop at a slower rate?

I have this option in my game that causes intense calculations and I need to run several loops in order to achieve what I want. This option of course freezes the game and the CPU reaches the sky.

So, I want to know if there is any way of making a loop that will run more slowly. I have tried using 'Each X seconds' and 'Wait' along with the loops, but that causes errors..

Should I improvise and make my own loops? Like, increase a local variable (the loop index) each X seconds and do some stuff?

Any loop event will complete in the same frame it is run.

If you want to run a loop over time, use every x seconds (or every tick), and an incrementing counter to keep track of how many times to loop.

For example,

Every 0.1 seconds

countervariable < x

-> Do looped action

-> Add one to countervariable

You can combine this with smaller loops as well, to break up a larger loop into smaller ones in succession.