firebrand vs young Turk

firebrand

noun
  • An argumentative troublemaker or revolutionary; one who agitates against the status quo. 

  • A torch or other burning stick with a flame at one end. 

young Turk

noun
  • A young person who agitates for political or other reform; a young person with a rebellious disposition. 

  • From the late-19th to the early-20th century, a member of a movement that campaigned for reform of the Ottoman Empire. 

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