Absence Approvals based on Occurrences

Summary:

I would like to know how to set up approval rule based on occurrences for a specific leave type.

Content (required):

If a staff is availing a specific leave type more than 3 times a year, then we need approval from head of the department.

Version (include the version you are using, if applicable):

23B

Code Snippet (add any code snippets that support your topic, if applicable):