blindside vs dead spot

blindside

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

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

  • A person's weak point. 

  • 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. 

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

  • To catch off guard; to take by surprise. 

dead spot

noun
  • A part of a scene that has insufficient lighting. 

  • A location around an earthquake epicentre that is prone to earthquake. 

  • An area that has no radio (or wi-fi) reception. 

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