blindside vs mat

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. 

mat

noun
  • A thin surface layer; superficial cover. 

  • A floor pad to protect athletes. 

  • A small flat piece of material used to protect a surface from anything hot or rough; a coaster. 

  • A flat piece of coarse material used for wiping one’s feet, or as a decorative or protective floor covering. 

  • A material or component needed for a crafting recipe. 

  • A thickly tangled mess. 

  • An alloy of copper, tin, iron, etc.; white metal. 

  • A thin layer of woven, non-woven, or knitted fiber that serves as reinforcement to a material. 

verb
  • To cover, protect or decorate with mats. 

  • To form a thick, tangled mess; to interweave into, or like, a mat; to entangle. 

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