Probably you've seen this tab and clicked once or twice....
Under Wireless -> Access points -> select an AP -> click on RF this will display historical utilization over the channels in use.
This can be very helpful if you are having bad wireless connections at specific times during the day. Below you can see a screenshot from my AP at home. You can specify either 2.4 or 5Ghz channels or even view live data from the second dropdown.
Between 6-7PM we can see a big spike on 802.11 traffic near this AP.
Share below if you've used this tool before and how it helped!