edifice vs superstructure

edifice

noun
  • A building; a structure; an architectural fabric, especially a large and spectacular one 

  • An abstract structure; a school of thought. 

superstructure

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

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

  • All that part of a building above the basement. 

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