picture vs undirected graph

picture

noun
  • A paragon, a perfect example or specimen (of a category). 

  • A painting. 

  • Situation. 

  • ("the pictures") Cinema (as a form of entertainment). 

  • A representation of anything (as a person, a landscape, a building) upon canvas, paper, or other surface, by drawing, painting, printing, photography, etc. 

  • The art of painting; representation by painting. 

  • An image; a representation as in the imagination. 

  • A figure; a model. 

  • A sample of an illegal drug. 

  • A photograph. 

  • A format string in the COBOL programming language. 

  • An attractive sight. 

verb
  • To depict or describe vividly. 

  • To represent in or with a picture. 

  • To imagine or envision. 

undirected graph

noun
  • A graph in which the edges are not ordered, so the edge (a, b) is identical to the edge (b, a). 

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