ClamAV virus padders and determine start time

Hello, everybody,

the forum around the topic antivirus is still quite thinly seeded. I would be interested in the following.

I would like to have the ClamAV renew the virus padders twice a day. Then I would also like to run ClamAV at a time I define (namely when I am not working on the system)

How do I adjust this. Answers also gladly in German

I think this is not possible, because ClamAV checks also all new files for bad signatures.