Divide by 10 Clock divider

[RickRac]

On a ESP32-S3, I want to create a simple clock output of say 7.8 Hz.

ledcAttachChannel(1,78,12, 2); //will give me 78 Hz quite nicely.
How can I divide the clock down by 10 or even 100? This is simple for some but I am so frustrated trying things.
Thanks Rick

[eriksl]

That is very little information. What is it you actually want (without skipping to some "solution")?