callus vs scrap

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. 

scrap

noun
  • A (small) piece; a fragment; a detached, incomplete portion. 

  • Loose-leaf tobacco of a low grade, such as sweepings left over from handling higher grades. 

  • A fight, tussle, skirmish. 

  • The crisp substance that remains after drying out animal fat. 

  • The smallest amount. 

  • Discarded objects (especially metal) that may be dismantled to recover their constituent materials, junk. 

  • A piece of deep-fried batter left over from frying fish, sometimes sold with chips. 

  • A Hispanic criminal, especially a Mexican or one affiliated with the Sureno gang. 

  • Leftover food. 

verb
  • To discard. 

  • To make into scrap. 

  • to fight 

  • To stop working on indefinitely. 

  • To scrapbook; to create scrapbooks. 

  • To dispose of at a scrapyard. 

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