cochlea vs ear bud

cochlea

noun
  • 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. 

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

ear bud

noun
  • An underdeveloped mammalian ear. 

  • An immature ear of maize from which the threadlike silks emerge. 

  • A small earphone designed to be placed in the ear canal for use with portable sound systems. 

  • A cotton swab. 

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