calculation vs foreguess

calculation

noun
  • Reckoning, estimate. 

  • The result of calculating. 

  • The act or process of calculating. 

  • An expectation based on circumstances. 

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

foreguess

noun
  • A conjecture; an assumption. 

verb
  • To forecast. 

  • To guess beforehand. 

  • To conjecture; assume. 

  • To anticipate; expect. 

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