auricle vs shell-like

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. 

shell-like

noun

  • The ear. 

adj

  • Having a similar shape to a seashell. 

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