callus vs pat

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. 

pat

noun
  • A light tap or slap, especially with the hands 

  • A flattish lump of soft matter, especially butter or dung. 

  • The sound of a light slap or tap with a soft flat object, especially of a footstep 

adv
  • Opportunely, in a timely or suitable way. 

  • Perfectly. 

adj
  • Exactly suitable, fitting, apt; timely, convenient, opportune, ready for the occasion; especially of things spoken. 

  • Trite, being superficially complete, lacking originality. 

verb
  • To stroke or fondle (an animal). 

  • To hit lightly and repeatedly with the flat of the hand to make smooth or flat 

  • To (gently) tap the flat of one's hand on a person or thing. 

  • To gently rain. 

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