best man vs counselor

best man

noun
  • The primary attendant to the groom in a wedding ceremony. 

  • Used other than figuratively or idiomatically: see best, man. 

counselor

noun
  • A children’s supervisor, usually at camp. 

  • A school counselor, often in a specialty such as careers, education, or health. 

  • A professional who counsels people, especially on personal problems. 

  • An attorney. 

  • A high ranking diplomat, usually just below an ambassador or minister. 

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