The Stakeout - ALPR Frequency Monitor plugin tracks how often vehicles are detected by fixed Sharp cameras. The system can alert Security Desk users if vehicles without whitelisted license plates have exceed the configured threshold.
If a vehicle is detected near a secure facility multiple times within a certain time frame, you might consider the activity suspicious and worth further investigation. In this case, you might configure the plugin to alert specific Security Desk operators if an unknown vehicle is detected by Sharp cameras, for example, five or more times in one day.