Hi @madmanweb,
You can definitely customize this. There are two ways to do this:
1. Set a global update time interval for all your feeds
2. Set the update time interval for each feed
The global option can be found in the RSS Aggregator – Settings page and is called Update Interval.
The feed’s option can be found in their edit page. Go to the RSS Aggregator – Feed Sources page and click on a feed’s name to edit them. Look for a section called Feed Processing. This is usually on the right-hand side of the screen. You should see an option called Update Interval. Click the Edit link next to it and the option should appear.
Note that you can set the feed’s update interval to “Default” to use the global option.
Hope this helps!