silhouette vs structure

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. 

structure

noun
  • The underlying shape of a solid. 

  • The overall form or organization of something. 

  • Underwater terrain or objects (such as a dead tree or a submerged car) that tend to attract fish 

  • A body, such as a political party, with a cohesive purpose or outlook. 

  • A cohesive whole built up of distinct parts. 

  • A set along with a collection of finitary functions and relations. 

  • Several pieces of data treated as a unit. 

  • A set of rules defining behaviour. 

verb
  • To give structure to; to arrange. 

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