danger vs possibility

danger

noun
  • An instance or cause of likely harm. 

  • The stop indication of a signal (usually in the phrase "at danger"). 

  • Exposure to likely harm; peril. 

possibility

noun
  • A thing possible; that which may take place or come into being. 

  • The quality of being possible. 

  • An option or choice, usually used in context with future events. 

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