diehard vs young Turk

diehard

noun
  • A person with such an attitude. 

adj
  • Unreasonably or stubbornly resisting change. 

  • Fanatically opposing progress or reform. 

  • Complete; having no opposite opinion of anything in a particular topic of one's values; thorough of in one's beliefs. 

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 diehard and young Turk occurred in a corpus of books? (source: Google Ngram Viewer )