computer graphics vs draftsmanship

computer graphics

noun
  • The representation and manipulation of pictorial data by a computer. 

  • The various technologies used to create and manipulate such pictorial data. 

  • A sub-field of computer science which studies methods for digitally synthesizing and manipulating visual content. 

  • The images so produced. 

draftsmanship

noun
  • the skill of drawing 

  • the art or craft of a draftsman 

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