assessor vs line judge

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. 

line judge

noun
  • An official who watches the lines of the court and judges whether the ball has landed in or out and also declares foot faults. 

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