calculation vs presumption

calculation

noun
  • An expectation based on circumstances. 

  • Reckoning, estimate. 

  • The result of calculating. 

  • The act or process of calculating. 

  • The act or process of imagining sequences of potential moves and responses without actually moving the pieces. 

presumption

noun
  • the condition upon which something is presumed 

  • the belief of something based upon reasonable evidence, or upon something known to be true 

  • the act of presuming, or something presumed 

  • An inference that a trier of fact is either permitted or required to draw under certain factual circumstances (as prescribed by statute or case law) unless the party against whom the inference is drawn is able to rebut it with admissible, competent evidence. 

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