convex vs knee

convex

noun
  • Any convex body or surface. 

  • A playing card made convex for use in cheating. 

  • A small convex mirror used to cheat by observing other players' cards. 

adj
  • arranged such that for any two points in the set, a straight line between the two points is contained within the set. 

  • Curved or bowed outward like the outside of a bowl, circle, or sphere. 

  • having no internal angles greater than 180 degrees. 

  • having an epigraph that is a convex set. 

knee

noun
  • Any knee-shaped item or sharp angle in a line; an inflection point. 

  • In the horse and allied animals, the carpal joint, corresponding to the wrist in humans. 

  • The part of a garment that covers the knee. 

  • In humans, the joint or the region of the joint in the middle part of the leg between the thigh and the shank. 

  • A piece of timber or metal formed with an angle somewhat in the shape of the human knee when bent. 

  • An act of kneeling on one knee, typically to acknowledge an injury or sacrifice or otherwise to show respect. 

  • A blow made with the knee; a kneeing. 

verb
  • To poke or strike with the knee. 

  • To move on the knees; to use the knees to move. 

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