drawing vs undirected graph

drawing

noun
  • A picture, likeness, diagram or representation, usually drawn on paper. 

  • A small portion of tea for steeping. 

  • The act of producing such a picture. 

  • Such acts practiced as a graphic art form. 

  • An act or event in which the outcome (e.g., designating a winner) is selected by chance in the form of a blind draw, notably of lots; especially such a contest in which a winning name or number is selected randomly by removing (or drawing) it from a container, popularly a hat. 

  • The process of drawing or pulling something. 

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 drawing and undirected graph occurred in a corpus of books? (source: Google Ngram Viewer )