pock vs wheal

pock

noun
  • A pus-filled swelling on the surface on the skin caused by an eruptive disease. 

  • Any pit, especially one formed as a scar 

verb
  • To scar or mark with pits 

wheal

noun
  • A small raised swelling on the skin, often itchy, caused by a blow from a whip or an insect bite etc. 

  • A mine. 

verb
  • Synonym of wale. 

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