dewlap vs mane

dewlap

noun
  • The pendulous skin under the neck of an ox, or a similar feature on any other animal. 

  • The sagging flesh on the throat of an elderly human. 

mane

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

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

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

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