instigator vs wrangler

instigator

noun
  • A person who intentionally instigates, incites, or starts something, especially one that creates trouble. 

wrangler

noun
  • Someone who wrangles or corrals. 

  • A cowboy who takes care of tourists. 

  • A student who has completed the third year of the mathematical tripos with first-class honours. 

  • An animal handler or trainer. 

  • A special education teacher. 

  • A cowboy who takes care of saddle horses. 

  • A brawler or disputant. 

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