dupe vs sell someone down the river

dupe

noun

  • A duplicate of an order receipt printed for kitchen staff. 

  • A duplicate of a photographic image. 

  • A person who has been deceived. 

  • A duplicate. 

  • A counterfeit; a fake. 

verb

  • To duplicate. 

  • To swindle, deceive, or trick. 

sell someone down the river

How often have the words dupe and sell someone down the river occurred in a corpus of books? (source: Google Ngram Viewer )