audition vs shell-like

audition

noun
  • The sense of hearing. 

  • A performance, by an aspiring performer, to demonstrate suitability or talent. 

  • An act of hearing; being heard. 

  • Something heard. 

verb
  • To evaluate one or more performers in through an audition. 

  • To take part in such a performance. 

shell-like

noun
  • The ear. 

adj
  • Having a similar shape to a seashell. 

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