Does anyone know what the animation length of the fires is?

I’d like to loop my video seamlessly. What’s the animation length of the default large fire with smoke and also the circling birds called “the death squad?” Is there a way to see what the length is?
Is there any logic to it, say like the fire is 3 seconds and the birds are 9?

The Death Squad is a 20 second loop, but no clue on the fire. If there were a common denominator, that’d be great to know.