IRSpy help: info/reliability

Measures the reliability of the target only in its ability to respond to connections: the display indicates the number of successful connections in the last two months, the total number of attempted connections in that time, and the percentage of successful connections.

For example, reliability of 9/15 = 60% indicates that fifteen attempts have been made to connect to the server in the last two months, of which nine (60%) have been successful.