instigate vs look for trouble

instigate

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

  • to incite; to bring about by urging or encouraging 

look for trouble

verb
  • to deliberately act in a way that's likely to lead to a fight. 

  • to do things that are likely to cause problems. 

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