Depends upon the version. If this is Symposium then it is not possible. However if you have Contact Center Manager 7 or AACC then you can get the basics of what you are looking for in a Contact Summary report. This report can be filtered by Skillset and the number of times a particular call has been returned to queue (more than 0 for example). This won't give you a total count (you would need to add up the number). Since this information is in the database you could use the Report Creation Wizard or Excel to total the number.
On another note I would put some serious effort into reducing this number. Customers are impacted by this in addition to trashing other stats (answer speed, abandons, etc.). Sounds like some agent training is needed.