Setting window for daily discovery

Hello,

I am trying to set the time of day during which discovery runs.

I am using the dispatcher service, like in this post: Force time for discovery runs RC Poller

I have set the discovery frequency to 86400 (1 day), and it is currently running at about 1AM every night.

However, I want to be able to control at which time of day discovery runs, so that any changes to the network will be able to be reacted upon during working hours.

I have searched everywhere that I think makes sense, and I cannot find where I am supposed to set time-of-day for discovery-