callus vs tickle

callus

noun
  • A hardened area of the skin (especially on the foot or hand) caused by repeated friction, wear or use. 

  • 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. 

verb
  • To form such hardened tissue. 

tickle

noun
  • An itchy feeling resembling the result of tickling. 

  • A light tap of the ball. 

  • The act of tickling. 

  • A narrow strait. 

verb
  • To appeal to someone's taste, curiosity etc. 

  • To unexpectedly touch or stroke delicately in a manner which causes displeasure or withdrawal. 

  • To catch fish in the hand (usually in rivers or smaller streams) by manually stimulating the fins. 

  • To touch repeatedly or stroke delicately in a manner which causes laughter, pleasure and twitching. 

  • To cause delight or amusement in. 

  • To feel titillation. 

  • To feel as if the body part in question is being tickled. 

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