carpentry vs metalwork

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. 

metalwork

noun
  • The act of shaping metal, metalworking. 

  • Objects made of metal. 

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