debar vs instigate

debar

verb
  • To hinder or prevent. 

  • To exclude or shut out; to bar. 

  • To prohibit (a person or company that has been convicted of criminal acts in connection with a government program) from future participation in that program. 

instigate

verb
  • to incite; to bring about by urging or encouraging 

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

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