hearing vs inner ear

hearing

noun
  • The act by which something is heard. 

  • The sense used to perceive sound. 

  • A proceeding at which discussions are heard. 

  • A legal procedure done before a judge, without a jury, as with an evidentiary hearing. 

adj
  • Able to hear, as opposed to deaf. 

inner ear

noun
  • Mind's ear. 

  • The portion of the ear located within the temporal bone which includes the semicircular canals, vestibule, and cochlea and is responsible for hearing and balance. 

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