en.wikipedia.org/wiki/Help:User_contributions

Showing page report for: Help:User contributions - Wikipedia
To see your duplicate content highlighted on the page, click on a row in the table below: 
Page Duplicate Content Search title or URL  
  URL ▴ Title Match Words Match Percentage
wiki/Help:Page_history Help:Page history - Wikipedia 826 21%
wiki/Help:Reverting Help:Reverting - Wikipedia 755 19%
wiki/Help:Viewing_media Help:Viewing media - Wikipedia 254 7%