expectation vs odds

expectation

noun
  • The value of any chance (as the prospect of prize or property) which depends upon some contingent event. 

  • The act or state of expecting or looking forward to an event as about to happen. 

  • The first moment; the long-run average value of a variable over many independent repetitions of an experiment. 

  • The arithmetic mean. 

  • The leaving of a disease principally to the efforts of nature to effect a cure. 

  • The prospect of the future; grounds upon which something excellent is expected to occur; prospect of anything good to come, especially of property or rank. 

  • That which is expected or looked for. 

odds

noun
  • The ratio of winnings to stake in betting situations. 

  • The ratio of the probability of an event happening to that of it not happening. 

  • I'd say the odds are strongly in favor of the sun rising tomorrow morning. 

  • An advantage given to a weaker opponent in order to equalize the game when playing casually, usually by removing one of the stronger player's pieces or by giving the weaker player more time. 

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