counselor vs kibitzer

counselor

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

  • A children’s supervisor, usually at camp. 

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

  • An attorney. 

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

kibitzer

noun
  • A person who offers unsolicited views, advice, or criticism; one who kibitzes. 

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