How do you schedule when (date and time) clamscan runs?

Hi,

ClearOS - 2.5.2

Clamscan had always taken over the whole server bogging down the CPU (Clamd high CPU usage) and its performance while it scans the whole system. It didn't used to be this bad. However, lately Clamscan seems to be running a lot especially almost always EVERY MORNING around 8am to 10am holding the server HOSTAGE for hours; not being able to download emails or view the website.

But I did read that I can schedule when Clamscan runs (date and time). I would strongly prefer that clamscan runs at OFF-PEAK hours like weekends say every Saturday at 11PM.

Is there a way to schedule when Clamscan runs on ClearOS?

Can someone give me the command to be able to do that?

Thank you,