Newstex polls roughly every hour on each feed. We can specify a given feed to poll less often, but we can not specify set times for when a feed is polled.
 
However, what we can do is specify that a feed should process updates to stories. That means if we pull in a story that isn't complete and then the publisher updates it later, we would grab that update. We require that the GUID is not a link and does not change between updates.

The publisher should notify us if they would like process updates enabled.