draughtsman vs interior designer

draughtsman

noun
  • A person skilled at drawing engineering or architectural plans. 

  • A piece in the game of draughts (checkers). 

interior designer

noun
  • A home decor designer; a person in the business of interior design. 

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