long shot vs side bet

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. 

side bet

noun
  • An investment or risk undertaken by a company that is not part of its core business. 

  • A bet on some aspect of a game or competition that is not the main bet of the game or the prize of the competition; proposition bet. 

  • An investment of time, money, or resources that reinforces one's commitment to a course of action. 

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