callus vs spend

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. 

spend

verb
  • To be diffused; to spread. 

  • To waste or wear away; to be consumed. 

  • To bestow; to employ; often with on or upon. 

  • To exhaust, to wear out. 

  • To pay out (money). 

  • To consume, to use up (time). 

  • To break ground; to continue working. 

noun
  • Discharged semen. 

  • Expenditures; money or pocket money. 

  • Vaginal discharge. 

  • Amount of money spent (during a period); expenditure. 

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