flea market vs supermarket

flea market

noun
  • A permanent indoor market of stalls in a warehouse selling inexpensive antiques, outdated goods, curios, etc. 

  • An outdoor temporary market selling inexpensive antiques, curios etc. 

supermarket

noun
  • A chain of such stores. 

  • A one-stop shop; a place offering a range of products or services. 

  • A large self-service store that sells groceries and, usually, medications, household goods, and/or clothing. 

How often have the words flea market and supermarket occurred in a corpus of books? (source: Google Ngram Viewer )