arris vs inclination

arris

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

  • Buttocks, arse. 

inclination

noun
  • A slant or slope. 

  • A tendency. 

  • The angle of intersection of a reference plane 

  • A physical tilt or bend. 

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