betty vs cover girl

betty

noun
  • An attractive woman; a babe. 

  • A short bar used by thieves to wrench doors open; a jimmy. 

  • A baked dessert made with alternating layers of sweetened fruit and buttered bread crumbs. 

cover girl

noun
  • An attractive, usually well-known, female model whose image has been featured on one or more magazine covers. 

How often have the words betty and cover girl occurred in a corpus of books? (source: Google Ngram Viewer )