carcass vs superstructure

carcass

noun
  • The framework of a structure, especially one not normally seen. 

  • The body of a slaughtered animal, stripped of unwanted viscera, etc. 

  • The body of a dead human, a corpse. 

  • The body of a dead animal. 

  • An early incendiary ship-to-ship projectile consisting of an iron shell filled with saltpetre, sulphur, resin, turpentine, antimony and tallow with vents for flame. 

superstructure

noun
  • Any material structure or edifice built on something else; that which is raised on a foundation or basis. 

  • The sleepers and fastenings, in distinction from the roadbed. 

  • The social sphere of ideology which includes religion, art, politics, law and all traditional values. 

  • Any structure built above the top full deck (FM 55-501). 

  • All that part of a building above the basement. 

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