shop floor vs workbench

shop floor

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

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

workbench

noun
  • A sturdy bench or table at which manual work is done by a carpenter, machinist, etc. 

How often have the words shop floor and workbench occurred in a corpus of books? (source: Google Ngram Viewer )