chairman vs chancellery

chairman

noun
  • The head of a corporate or governmental board of directors, a committee, or other formal entity. 

  • Someone whose job is to carry people in a portable chair, sedan chair, or similar conveyance. 

  • A person presiding over a meeting. 

verb
  • To serve as chairman. 

chancellery

noun
  • The office or staff of a chancellor 

  • The rank or post of a chancellor 

  • The building in which such an office is situated 

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