expectation vs phenomenon

expectation

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

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

  • 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. 

phenomenon

noun
  • A thing or being, event or process, perceptible through senses; or a fact or occurrence thereof. 

  • An experienced object whose constitution reflects the order and conceptual structure imposed upon it by the human mind (especially by the powers of perception and understanding). 

  • A knowable thing or event (eg by inference, especially in science) 

  • A kind or type of phenomenon (sense 1 or 2) 

  • A fact or event considered very unusual, curious, or astonishing by those who witness it. 

  • A wonderful or very remarkable person or thing. 

  • Appearance; a perceptible aspect of something that is mutable. 

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