blunt vs callus

blunt

verb
  • To dull the edge or point of, by making it thicker; to make blunt. 

  • To repress or weaken; to impair the force, keenness, or susceptibility, of 

adj
  • Having a thick edge or point; not sharp. 

  • Abrupt in address; plain; unceremonious; wanting the forms of civility; rough in manners or speech. 

  • Dull in understanding; slow of discernment; opposed to acute. 

  • Hard to impress or penetrate. 

  • Slow or deficient in feeling: insensitive. 

noun
  • A marijuana cigar. 

  • A playboating move resembling a cartwheel performed on a wave. 

  • A short needle with a strong point. 

  • A fencer's practice foil with a soft tip. 

callus

verb
  • To form such hardened tissue. 

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

  • 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. 

  • 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. 

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