All operation operations in Unimus work on Schedules.

You can define any number of schedules, and each schedule can have different periodicity.
(cron expression, or pre-made hourly, daily, monthly, etc.)

The

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Default Schedule

There must always be at least 1 Default Schedule in Unimus.
(and one is automatically created for you when Unimus runs for the 1st time)

You can't delete a the Default Schedule.
If you wish to delete it, you must first choose a different schedule to be the Default Schedule.

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If you wish some devices to be polled differently (or some operations to run differently) from the Default Schedule, you can assign an explicit schedule to a device / operation.

Simply create a schedule in the "Schedules" view, and assign it to the device.
(either during the device creation, or "Edit" the device)

The same applies to NSM sync, Sync, Mass Config Push, and Network Scan as well -  you can use an explicit shcedule there as wellschedule in each of the respective features.

If you delete a schedule that is used like this, all operations that were using the schedule will be re-scheduled to the Default Schedule.