agreement vs authorization

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. 

authorization

noun
  • (A document giving) formal sanction, permission or warrant. 

  • Permission. 

  • Permission, possibly limited, to spend funds for a specific budgetary purpose. 

  • An act of authorizing. 

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