apostrophe vs tropology

apostrophe

noun
  • A sudden exclamatory piece of dialogue addressed to someone or something, especially absent. 

  • The text character ’, which serves as a punctuation mark in various languages and as a diacritical mark in certain rare contexts. 

tropology

noun
  • The use of a trope (metaphor or figure of speech). 

  • The interpretation of scripture or other work in order to educe moral or figurative meaning; a treatise of such interpretation. 

  • A recurring motif or metaphor, a trope; an interplay of tropes. 

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