computer graphics vs illustration

computer graphics

noun
  • The images so produced. 

  • 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 representation and manipulation of pictorial data by a computer. 

illustration

noun
  • A picture designed to decorate a publication, or elucidate a literary work. 

  • A calculated prevision of insurance premiums and returns (life insurance) 

  • The state of being illustrated, or of being made clear and distinct. 

  • The act of illustrating; the act of making clear and distinct; 

  • Something which illustrates; a comparison or example intended to make clear or apprehensible, or to remove obscurity. 

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