convex vs pear-shaped

convex

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

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

  • having no internal angles greater than 180 degrees. 

  • having an epigraph that is a convex set. 

noun
  • A playing card made convex for use in cheating. 

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

  • Any convex body or surface. 

pear-shaped

adj
  • Having a shape of a (typical western) pear, or in cross-section, like the cross-section of a pear. 

  • Having gynoid fat distribution, not android fat distribution. 

  • Wrong, awry, usually in the phrase go pear-shaped. 

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