What is timo from sleep(9) functions

From: Farhan Khan <farhan_at_farhan.codes>
Date: Thu, 05 May 2022 13:49:16 UTC
Hi all,

Hopefully simple question:

What is the unit of the `int timeo` parameter in sleep(9)? Is it the timeout in milliseconds? Or would 1 mean a second?
Related, what does the `hz` variable mean and why is it used? I see instances of timo's in multiples of hz (ie, hz * 10). OpenGrok shows it defined in a few different places and its not clear to me which it is.

Thank you!
Farhan Khan
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