carpentry vs dormer

carpentry

noun
  • 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. 

  • A carpenter's workshop. 

dormer

noun
  • A room-like, roofed projection from a sloping roof. 

  • A resident of a dormitory. 

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