insure vs sponsor

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. 

sponsor

verb
  • To be a sponsor for. 

noun
  • A person or organisation with some sort of responsibility for another person or organisation, especially where the responsibility has a religious, legal, or financial aspect. 

  • One that pays all or part of the cost of an event, a publication, or a media program, usually in exchange for advertising time. 

  • A senior member of a twelve step or similar program assigned to a guide a new initiate and form a partnership with him. 

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