callus vs crease

callus

noun
  • The material of repair in fractures of bone; a substance exuded at the site of fracture, which is at first soft or cartilaginous in consistency, but is ultimately converted into true bone and unites the fragments into a single piece. 

  • A shining area on the frons of many species of Tabanomorpha (horse flies and relatives). 

  • The new formation over the end of a cutting, before it puts out rootlets. 

  • A hardened area of the skin (especially on the foot or hand) caused by repeated friction, wear or use. 

verb
  • To form such hardened tissue. 

crease

noun
  • A crack. 

  • One of the white lines drawn on the pitch to show different areas of play; especially the popping crease, but also the bowling crease and the return crease. 

  • The circle around the goal, where no offensive players can go. 

  • A line or mark made by folding or doubling any pliable substance; hence, a similar mark, however produced. 

  • The goal crease; an area in front of each goal. 

verb
  • To make a crease in; to wrinkle. 

  • To laugh. 

  • To lightly bloody; to graze. 

  • To undergo creasing; to form wrinkles. 

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