Install drainage... At what distance?

Hello everyone!

Since our soil is extremely clayey, surface water percolates very slowly.

We definitely want to drain our lawn area with drainage.

At what distance are drainage pipes laid from each other?

I somehow can't find any concrete information about this on the internet?!

I would be very happy to hear some experience reports.

Save yourself the trouble, in my opinion it doesn't make sense. Better to mix sand and humus.