We can open "Settings..." for options on how often Update Manager checks for updates, and to always install security updates in the background.
The automatic check for updates can be set in steps from Never, Every two weeks, Weekly, Every two days, and Daily.
It is recommended to check for security updates frequently. You may install them automatically in the background without getting a notice. Updating of other packages can be done whenever this is convenient, but you will not get bugs fixed until you do it.