apostrophe vs discursion

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. 

discursion

noun
  • Ratiocination; step-by-step philosophical reasoning, as opposed to intuition. 

  • Digression. 

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