Regular Expression To Match Multiple "-" occurances in a Filename

Regular Expression To Match Multiple "-" occurances in a Filename

I am Trying to Construct a Regular Expression to Find File names Which
have Multiple - Occurrences. I Mainly need this Regular Expression to ID
Tag MP3 Files Which are in a Format - .
The Problem is that Some artists in my Collection have a - in their name.
Hence I need to Construct a Regular Expression which will list all those
File names which have Multiple - in their File name ( One for the Artist
Name, and the other that act as a separator between the Artist and the
Title [ Such as Ar-tist - Title ), to Manually Tag Them.
So far I managed to Extract File names with a Single - Using the Regular
Expression
*-*
What I need Now is a Regular Expression to Match two Literal -.
Thank you, Andrew Borg