lanugo vs mane

lanugo

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

mane

noun
  • Long or thick hair of a person's head. 

  • Longer hair growth on back of neck of an animal, especially a horse or lion 

  • Part of a naval sword between the tang button and the quillon. 

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