agreement vs endorsement

agreement

noun
  • A legally binding contract enforceable in a court of law. 

  • Rules that exist in many languages that force some parts of a sentence to be used or inflected differently depending on certain attributes of other parts. 

  • An understanding between entities to follow a specific course of conduct. 

  • A state whereby several parties share a view or opinion; the state of not contradicting one another. 

endorsement

noun
  • An amendment or annotation to an insurance contract or other official document (such as a driving licence). 

  • The act or quality of endorsing 

  • Sponsorship, in means of money, by a company, business or enterprise. 

  • An instructor's signed acknowledgement of time practising specific flying skills. 

  • Permission to carry out a specific skill or application in a field in which the practitioner already has a general licence. 

  • Support from an important, renowned figure of a media (celebrity, politics, sports, etc.), to get back up. 

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