convex vs hem

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. 

hem

noun
  • A rim or margin of something. 

  • In sheet metal design, a rim or edge folded back on itself to create a smooth edge and to increase strength or rigidity. 

  • An utterance or sound of the voice like "hem", often indicative of hesitation or doubt, sometimes used to call attention. 

  • The border of an article of clothing doubled back and stitched together to finish the edge and prevent it from fraying. 

intj
  • Used to fill in the gap of a pause with a vocalized sound. 

verb
  • To shut in, enclose, confine; to surround something or someone in a confining way. 

  • To make the sound expressed by the word hem; to hesitate in speaking. 

  • To make a hem. 

  • To put hem on an article of clothing, to edge or put a border on something. 

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