appraisal vs rating

appraisal

noun
  • A judgment or assessment of the value of something, especially a formal one. 

  • The act or process of developing an opinion of value. 

rating

noun
  • An evaluation of status, especially of financial status. 

  • An enlisted seaman not a commissioned officer or warrant officer. 

  • A number, letter, or other mark that refers to the ability of something. 

  • A position on a scale. 

  • A quantitative measure of the audience of a television program. 

  • A seaman in a warship. 

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