blindside vs disappointment

blindside

noun
  • A person's weak point. 

  • The blindside flanker, a position in rugby union, usually number 6. 

  • A tram/train driver's field of blindness around a tram (trolley/streetcar) or a train; the side areas behind the tram/train driver. 

  • The space on the side of the pitch with the shorter distance between the breakdown/set piece and the touchline; compare openside. 

  • A driver's field of blindness around an automobile; the side areas behind the driver. 

verb
  • To attack (a person) on his or her blind side. 

  • To catch off guard; to take by surprise. 

disappointment

noun
  • Something or someone that disappoints: that which causes disappointment. 

  • An example or the act of disappointing: a circumstance in which a positive expectation is not achieved. 

  • The feeling or state of being disappointed: a feeling of sadness or frustration when something is not as good as one hoped or expected, or when something bad unexpectedly happens. 

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