diagonal vs obvolute

diagonal

adj
  • Having slanted or oblique lines or markings. 

  • 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). 

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. 

obvolute

adj
  • overlapping; contorted; convoluted 

  • Having two opposite leaves, each with one edge overlapping the nearest edge of the other. 

  • Having a circle of several leaves or petals which overlap in that manner. 

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