bran vs caryopsis

bran

noun
  • The broken coat of the seed of wheat, rye, or other cereal grain, separated from the flour or meal by sifting or bolting; the coarse, chaffy part of ground grain. 

  • The European carrion crow. 

caryopsis

noun
  • A type of fruit in which the fruit skin is stuck to the seed coat; especially the grain of a cereal. 

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