In Office Backup, you can assign the task for execution on a regular basis or a one time execution.
To do it, you need to proceed to Step 7 of the New Task Wizard.
Select the time period over which the backup will repeat. It can be day, week, month or a single session.
If you select to back up Once, in the next Step of the New Task Wizard, you should specify the date and time of backup. To change values of the date and time, click each value such as day, month, year, hour, minute, second, and then use the "arrows" to select a different value.
If you select Daily, you should specify the time of backup in Step 8: What time to back up.
If you select Weekly, you will have to choose the day of the week upon which the backup shall repeat in Step 8.
If you select Monthly, then choose the day of the month to do the backup in Step 8