cochlea vs dodman

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. 

dodman

noun
  • A snail's shell. 

  • A surveyor. 

  • A land-based snail. 

  • Any shellfish which casts its shell, such as a lobster. 

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