How often can I schedule a IDM or EDM to be indexed?

An EDM or IDM index can be scheduled through the UI.  This is done by creating a document profile and selecting "Submit Indexing Job on Schedule".  The schedule can be Daily, Weekly, Monthly or just once, based on the pulldown on the indexing page. 

We currently do not allow more frequent indexing than daily because of performance implications.  There is an Enhancement Request (PM-573) to allow more granularity of scheduled indexing for an EDM.