Had this answer from SW support:
If the AP is added as it's own Node into Orion then the Node Polling Interval(Default 120 seconds) will be used.
If however you're monitoring it through your Wireless LAN Controller then it uses the Statistics Collection Interval(Default 10 minutes)
To increase Statistics Collection Interval just go to your Controller in Manage Nodes and Edit Properties on the Controller. Change Collect Statistics to a lower number.
Ive tried to add the nodes to NPM using discovery, however, they are showing up as Unknown Devices and as we have so many devices, its not really possible for me to manually go through and add them via IP. Is it not possible to have them correctly identified, although I suspect not as they are only being discovered via icmp.