evaluation vs trial run

evaluation

noun
  • 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. 

  • A completion of a mathematical operation; a valuation. 

  • Determination of the value of a variable or expression. 

trial run

noun
  • An empirical test of the suitability or effectiveness of a method or thing by running it at least once. 

  • An empirical test of the suitability or capability of a person or actor by letting him perform at least once. 

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