cicerone vs counselor

cicerone

noun
  • A guide who accompanies visitors and sightseers to museums, galleries, etc., and explains matters of archaeological, antiquarian, historic or artistic interest.. 

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. 

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