silhouette vs vital statistics

silhouette

noun
  • An illustrated outline filled in with a solid color(s), usually only black, and intended to represent the shape of an object without revealing any other visual details; a similar appearance produced when the object being viewed is situated in relative darkness with brighter lighting behind it; a profile portrait in black, such as a shadow appears to be. 

verb
  • To represent by a silhouette; to project upon a background, so as to be like a silhouette. 

vital statistics

noun
  • Statistics of births, marriages and deaths. 

  • A concise set of trivia on a subject, sometimes in table format. 

  • The size of a woman's bust, waist and hips, normally measured in inches. 

How often have the words silhouette and vital statistics occurred in a corpus of books? (source: Google Ngram Viewer )