auricle vs compartment

auricle

noun
  • Synonym of atrium. 

  • The outer ear or pinna. 

  • 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. 

compartment

noun
  • A room, or section, or chamber 

  • Part of a protein that serves a specific function. 

  • A mound (often of grass) beneath the shield in a coat of arms on which the supporters stand. 

  • One of the parts into which an area is subdivided. 

  • A region in the body, delimited by a biological membrane. 

verb
  • To arrange in separate compartments. 

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