Do you mean you want to know how fast the monitoring shows the IPv4 and IPv6 servers as healthy again after an outage?
If so, I’ve just modified the NTP simulator to enable such analysis.
I’m not 100% sure I did it right, but it should run more or less correctly for 45 hours per 48 hours and way off for the remaining 3 hours, with a sudden jump from good to bad at 13:00 UTC and back to good at 16:00 UTC, for both IPv4 and IPv6 (on Sun, Tue, Thu, Sat). Let’s see what it does.