carpentry vs shop floor

carpentry

noun
  • A carpenter's workshop. 

  • A collection of timber connected by being framed together, as the pieces of a roof, floor, etc.; work done by a carpenter. 

  • The trade of cutting and joining timber in order to construct buildings or other structures; woodworking. 

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. 

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