Raise alerts only when more than one check has failed

I have a few RPC checks that are working great thus far. I now want an escalation policy where an alert is only raised when a certain subset of checks within the same group fail (for example, 2 out of 4 checks). Currently the escalations allow only threshold for time/number of failures. I was given to understand itcurrently isn't a feature of Checkly, but I feel it would be beneficial.