shop floor vs workstead

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. 

workstead

noun
  • Any place, such as a workshop, office, studio, or garage, set up where work can be performed; a workstation. 

  • A place of employment; workplace. 

  • A laboratory. 

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