assessor vs reviewer

assessor

noun
  • A specialist who assists the court in determining a matter. 

  • One who assesses a project for cost evaluation. 

  • A civil servant entrusted with checking the veracity of data and criteria used by a taxpayer to complete a tax return. 

  • An official responsible for student welfare. 

  • One who assesses a property for tax or insurance evaluation. 

reviewer

noun
  • An inspector. 

  • A person who writes reviews for a newspaper or other publication; a critic. 

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