Usage of UOM in Absence

Summary:

Need to know the functionality regarding each UOM.

Content (required):

In absence management, we see there are couple of UOM which are Days, Calendar Days, Hours etc., is there any oracle document which give the purpose of usage specially Days and Calendar Days.

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

22C

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