lanugo vs lint

lanugo

noun
  • Soft down or fine hair, specifically that covering the human foetus or a tumorous area. 

lint

noun
  • The fibrous coat of thick hairs covering the seeds of the cotton plant. 

  • A fine material made by scraping cotton or linen cloth; used for dressing wounds. 

  • Raw cotton ready for baling. 

  • Clinging fuzzy fluff that clings to fabric or accumulates in one's pockets or navel etc. 

verb
  • To perform a static check on (source code) to detect stylistic or programmatic errors. 

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