PropertySource polling interval

I have a device property that I would like to update every 15 minutes or so.  This is because I have groups with auto-include rules that are looking for that property.  I need to have the device move in and out of the groups on the fly.  It would be great if we could set individual custom propertysources to update on a more frequent basis.  Currently I'm achieving this using the LogicMonitor Rest API which I have baked right into a datasource as a workaround - but I think this solution is messy.

Thanks!