calculation vs doubling

calculation

noun
  • The act or process of calculating. 

  • Reckoning, estimate. 

  • The result of calculating. 

  • An expectation based on circumstances. 

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

doubling

noun
  • The process or an instance of making something double; a multiplication by two. 

  • A pleat or fold. 

  • The act of turning around, or doubling back. 

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