The Analyze page in the Cirrent Console is a great place to view all events across your entire fleet of devices over a time period.
The lines represent Event Types. Shown here are Wi-Fi Reassociation, PER High, DNS Not Responsive, Gateway Internet Error, IP Config Issue, and Internet Not Responsive.
In the below view of normalized data, the X axis shows the date and the Y axis represents standard deviations. We default to normalized data view because the count of events for different event types can vary widely. Normalized data highlights what is outside of the norm.
So in the below image, we have moused over the green line on 8/09/2019 for event type: Internet Not Responsive. With 0 being the average, and this point being 3.96, it is definitely worth investigating further.
You can also look at the event counts. See below for the same data, without normalization. You can see the counts for PER High are on average higher than other event types, so it skews the graph making it hard to read the other event types.
Cirrent continues to add standard event types, but you can also add custom events that you track.