Thanks for elaborating your points further more. We have a beta feature that allows you to see some of this though scheduling is not available in it at the moment.
From the alarms tab > click on "Infrastructure Events" (Which is the first item) > from the time period selection select your desired duration (Data is currently supported for a maximum of 30 days). This will give you the events that happened in chronological order. You can then group them by severity so that you get the percentage value for each status (as shown in the donut chart).
Below is a screenshot of the wfh group that I have and grouped by severity.
If you want to filter the events based on particular severity you can create a query as follows
logtype="Infrastructure Events" and monitorgroups CONTAINS "wfh" and (severity CONTAINS "Trouble" or severity CONTAINS "Critical")
Here you'll get the events as shown below
You can filter them with additional query and also group them by any column. Try it out and let us know if it helps.