carbuncle vs verruca

carbuncle

noun
  • An abscess larger than a boil, usually with one or more openings draining pus onto the skin. It is usually caused by staphylococcal infection. 

  • An unpopular or ugly building; an eyesore. 

verruca

noun
  • A sexine element similar to a wart. 

  • A wart, especially one that grows on the foot, caused by a human papilloma virus. 

  • A rounded projection or wart. 

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