centurion vs commodore

centurion

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

  • A player who scores a century. 

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

commodore

noun
  • A naval officer holding a rank between captain and rear admiral. 

  • A rear admiral (lower half). 

  • The president of a yacht club. 

  • Any of various nymphalid butterflies of the Asian genus Parasarpa. 

  • The leading ship in a fleet of merchantmen. 

  • A (temporary) commander over a collection of ships who is not an admiral. 

  • A commodore admiral. 

  • A yacht-club president's vessel in a regatta. 

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