delineation vs pie chart

delineation

noun
  • An image of the outline of an object. 

  • The act of delineating; depiction. 

  • A graphic verbal description. 

pie chart

noun
  • A pictorial graph in the shape of a circle, with segments representing related proportions 

How often have the words delineation and pie chart occurred in a corpus of books? (source: Google Ngram Viewer )