atabeg vs majordomo

atabeg

noun
  • A high medieval Turkish feudal title, originally charged with the caretaking and mentoring of the realm's crown prince. 

majordomo

noun
  • The head servant or official in a royal Spanish or Italian household; later, any head servant in a wealthy household in a foreign country; a leading servant or butler. 

  • Any overseer, organizer, person in command. 

  • A manager of a hacienda, ranch or estate. 

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