approximation vs evaluation

approximation

noun
  • An imprecise solution or result that is adequate for a defined purpose. 

  • The act of bringing together the edges of tissue to be sutured. 

  • The act, process or result of approximating. 

evaluation

noun
  • A completion of a mathematical operation; a valuation. 

  • An assessment, such as an annual personnel performance review used as the basis for a salary increase or bonus, or a summary of a particular situation. 

  • Determination of the value of a variable or expression. 

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