If once is too little, and always is too much, then an Action can be set to run for a maximum number of times using the "Limit # of executions" field.
Simply check the "Limit # of executions" box and enter a maximum number of times the Action is to be executed.
The respective number must be greater than 0 and smaller than 4,294,967,295.
NOTE that you can also tie an Action to a date/time condition as to only have it run once a week or month or only within business hours, for example.
NOTE: Users that have the role [Staging] in the MarvelClient Configuration database also see a drop down list below "Limit # of exections" allowing them to choose between "Retire locally" and "Delete" - you are advised to NOT change this setting; for further details see Staging.
See Also
The When tab
Specifying how often an Action is supposed to run (Repeat interval)
The "Keep local exec. info" option
Selecting one or multiple conditions of which ALL must match for an Action to execute
Selecting one or multiple conditions
Combining the ALL and At least ONE list of Conditions
Selecting one or multiple conditions out of which At least ONE must match for an Action to execute
Restricting an Action to only run for users with a specific home/mail-server