front office vs trustees

front office

adj
  • Pertaining to the portion of a business or organization that deals with customers and revenue generation. 

noun
  • An office to which members of the general public go when dealing with an organization. 

  • The executive or policymaking officers of an organization. 

  • The systems or divisions of an organization that deal with customer or public interactions and/or revenue generation. 

trustees

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