computation vs extrapolation

computation

noun
  • The result of computation; the amount computed. 

  • The act or process of computing; calculation; reckoning. 

extrapolation

noun
  • A calculation of an estimate of the value of some function outside the range of known values. 

  • The diametric opposite of interpolation. 

  • An inference about some hypothetical situation based on known facts. 

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