How to search Page names in UI using regular expressions


I’m trying to match Page URLs by regular expressions in the Pages widget and am not able to figure it out. A typical URL may look like Folder/FileOne, Folder/FileTwo, etc. What I want is something that will return a result set containing FileOne, FileTwo, etc., using a regex somewhat like Folder/.*

If you’ve gotten this to work, can you provide a working regex?