cochlea vs cowrie

cochlea

noun
  • A spiral-shaped shell, especially that of a snail. 

  • The complex, spirally coiled, tapered cavity of the inner ear of higher vertebrates, which contains the organ of Corti and in which sound vibrations are converted into nerve impulses. 

cowrie

noun
  • Any gastropod of the family Cypraeidae; its shell. 

  • A small gastropod (Monetaria moneta, syn. Cypraea moneta) common in the Indian Ocean; its shell. 

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