instigate vs kindle

instigate

verb
  • to goad or urge (a person) forward, especially to wicked actions; to provoke 

  • to incite; to bring about by urging or encouraging 

kindle

verb
  • To arouse or inspire (a passion, etc). 

  • To begin to grow or take hold. 

  • To start (a fire) or light (a torch, a match, coals, etc.). 

  • To bring forth young; to give birth. 

noun
  • A group of kittens. 

adj
  • pregnant 

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