carapace vs framework

carapace

noun
  • in figurative use 

  • A hard protective covering of bone or chitin, especially one which covers the dorsal portion of an animal. 

framework

noun
  • A basic conceptual structure. 

  • The larger branches of a tree that determine its shape. 

  • A reusable piece of code (and, sometimes, other utilities) providing a standard environment within which an application can be implemented. 

  • These ‘three principles of connexion’ compose the framework of principles in Hume's account of the association of ideas. 

  • The arrangement of support beams that represent a building's general shape and size. 

  • A support structure comprising joined parts or conglomerated particles and intervening open spaces of similar or larger size. 

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