lentigo vs pock

lentigo

noun
  • A brown pigmented spot on the skin. 

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 

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