chamfer vs diagonal

chamfer

noun
  • An obtuse-angled relief or cut at an edge added for a finished appearance and to break sharp edges. 

verb
  • To cut off the edge or corner of something. 

  • To cut a groove in something. 

diagonal

noun
  • A line or cut across a fabric at an oblique angle to its sides. 

  • Synonym of slash ⟨/⟩. 

  • A line joining non-adjacent vertices of a polygon. 

  • A line or plane at an oblique angle to another. 

adj
  • Having a slanted or oblique direction. 

  • Of or related to the cater-corner (diagonally opposite) legs of a quadruped, whether the front left and back right or front right and back left. 

  • Joining two nonadjacent vertices (of a polygon or polyhedron). 

  • Having slanted or oblique lines or markings. 

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