consultant vs guidance counselor

consultant

noun
  • A person or party that is consulted. 

  • A person whose occupation is to be consulted for their expertise, advice, service or help in an area or specialty; a party whose business is to be similarly consulted. 

  • A senior hospital-based physician or surgeon who has completed all specialist training and has been placed on the specialist register in their chosen speciality, roughly equivalent to an attending physician in North America. 

guidance counselor

noun
  • A school counselor. 

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