You can disable a workflow schedule. By default, a workflow schedule is enabled.
From the navigation pane, go to Developer tools.
The Developer tools page appears.
Click the Workflows tile.
The Workflows page appears.
In the upper-right corner of the page, from the All tasks list, select Schedules.
The Schedules page appears.
In the row for the workflow schedule that you want to disable, clear the check box in the Status column.