bark vs callus

bark

verb
  • To abrade or rub off any outer covering from. 

  • To make a clamor; to make importunate outcries. 

  • To speak sharply. 

  • To make a short, loud, explosive noise with the vocal organs (said of animals, especially dogs). 

  • To strip the bark from; to peel. 

  • To cover or inclose with bark, or as with bark. 

  • To girdle. 

noun
  • The crust formed on barbecued meat that has had a rub applied to it. 

  • The exterior covering of the trunk and branches of a tree. 

  • Peruvian bark or Jesuit's bark, the bark of the cinchona from which quinine is produced. 

  • A vessel, typically with three (or more) masts, with the foremasts (or fore- and mainmasts) square-rigged, and mizzenmast schooner-rigged. 

  • The short, loud, explosive sound uttered by a dog, a fox, and some other animals. 

  • An abrupt loud vocal utterance. 

  • The envelopment or outer covering of anything. 

  • A sailing vessel or boat of any kind. 

  • Hard candy made in flat sheets, for instance out of chocolate, peanut butter, toffee or peppermint. 

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 bark and callus occurred in a corpus of books? (source: Google Ngram Viewer )