scrutiny vs trial run

scrutiny

noun
  • Thorough inspection of a situation or a case. 

  • Intense study of someone or something. 

  • A ticket, or little paper billet, on which a vote is written. 

  • An examination by a committee of the votes given at an election, for the purpose of correcting the poll. 

  • An examination of catechumens, in the last week of Lent, who were to receive baptism on Easter Day. 

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 scrutiny and trial run occurred in a corpus of books? (source: Google Ngram Viewer )