auricle vs listener

auricle

noun
  • The outer ear or pinna. 

  • Synonym of atrium. 

  • An anterior ear-shaped appendage of the left or right atrium of the human heart. 

  • Any appendage in the shape of an ear or earlobe. 

listener

noun
  • A person's ear. 

  • Someone who listens, especially to a speech or a broadcast. 

  • A musical anthology. 

  • A function that runs in response to an event; an event handler. 

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