centurion vs potentate

centurion

noun
  • A player who scores a century. 

  • An officer of the ancient Roman army, in command of a century of soldiers. 

  • A pilot in the United States Navy who has performed 100 night landings on an aircraft carrier. 

potentate

noun
  • Someone acting in an important role. 

  • A self-important person. 

  • A powerful leader; a monarch; a ruler. 

  • A powerful polity or institution. 

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