blindside vs percussion

blindside

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

  • 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. 

  • 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. 

percussion

noun
  • The outer side of the hand. 

  • The detonation of a percussion cap in a firearm. 

  • The tapping of the body as an aid to medical diagnosis. 

  • The sound so produced. 

  • The repeated striking of an object to break or shape it, as in percussion drilling. 

  • The collision of two bodies in order to produce a sound. 

  • The section of an orchestra or band containing percussion instruments; such instruments considered as a group; in bands, may be separate from drum kits. 

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