long shot vs possibility

long shot

noun
  • Something unlikely; something that has little chance of happening or working. 

  • A master shot, the primary wide shot of a scene into which the closeups will be edited later. 

  • A shot fired at a distant target. 

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 long shot and possibility occurred in a corpus of books? (source: Google Ngram Viewer )