shop floor vs supermarket

shop floor

noun
  • The public area of a retail shop, as distinct from the offices and other rooms. 

  • The work area of a workshop, separate from the offices and other rooms. 

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 shop floor and supermarket occurred in a corpus of books? (source: Google Ngram Viewer )