long shot vs roll of the dice

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. 

roll of the dice

noun
  • A risky or uncertain attempt to do something, especially in an unfavourable situation. 

How often have the words long shot and roll of the dice occurred in a corpus of books? (source: Google Ngram Viewer )