These two metrics MTBF (Mean Time Between Failures) and MTTR (Mean Time To Repair) are displayed in the Alerts section.
The goal of these metrics is to quickly show you with two numbers the healthy of the application you are monitoring.
The values depend on the period you selected in the calendar. Plus, these values also depends on the frequency of execution of your script. If the script is often executed, these values will be as precise as possible.
For more information, see “Execution frequency” section in NeoSense documentation.