injure vs insure

injure

verb
  • To wound or cause physical harm to a living creature. 

  • To damage or impair. 

  • To do injustice to. 

insure

verb
  • To deal in such contracts; subscribe to a policy of insurance 

  • To provide for compensation if some specified risk occurs. Often agreed by policy (contract) to offer financial compensation in case of an accident, theft or other undesirable event. 

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