Uptime (noun)

The amount of time during which a machine, especially a computer, is operational and available for use.

Origin:

Mid 20th century; earliest use found in harvard business review. from up + time.

Examples:

1. The server had an impressive uptime of 99.9% last month.
2. The network administrator monitored the uptime of all computers on the network.
3. The website had frequent downtime due to technical difficulties, reducing its uptime.
4. The uptime of the system was essential for conducting business online.
5. The company guaranteed a minimum of 95% uptime for its cloud services.