butler vs general manager

butler

noun
  • The chief male servant of a household who has charge of other employees, receives guests, directs the serving of meals, and performs various personal services. 

  • A valet, a male personal attendant. 

  • A manservant having charge of wines and liquors. 

verb
  • To buttle, to dispense wines or liquors; to take the place of a butler. 

general manager

noun
  • A manager with overall responsibility for an organisation or a distinct unit of an organisation. 

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