callus vs peel away

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. 

peel away

verb
  • To become separate through peeling. 

  • To burn out while accelerating and rapidly depart; to peel off, peel out. 

  • To take away from something else. 

  • To separate off from the main body; to move off to one side (as in troop movements on a parade ground or in an organized retreat, or columns in a procession). 

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