arris vs cam

arris

noun
  • A sharp edge or ridge formed by the intersection of two surfaces 

  • A ridge formed on the surface of flaked stone, such as a arrowhead or hand axe, as the result of the intersection of two or more flake removals. 

  • A sharp edge or ridge formed by the intersection of two curved surfaces 

  • Buttocks, arse. 

cam

noun
  • A ridge or mound of earth. 

  • A spring-loaded camming device, a spring-loaded device for effecting a temporary belay in a rock crevice. 

  • A curved wedge, movable about an axis, used for forcing or clamping two pieces together. 

  • Camera. 

  • A turning or sliding piece which imparts motion to a rod, lever or block brought into sliding or rolling contact with it. 

verb
  • To go on webcam with someone. 

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