bean vs read/write head

bean

noun
  • The head or brain. 

  • The large edible seed of such a plant (for example, a broad bean, navy bean, or garbanzo bean). 

  • The clitoris. 

  • An object resembling a pea or bean in shape, often made from plastic or styrofoam and used in large numbers as packing material or as stuffing for beanbags and similar items. 

  • A person. 

  • The edible seedpod of such a plant. 

  • Money. 

  • The bean-like seed of certain other plants, such a a vanilla bean or (especially) a coffee bean. 

  • Any plant of several genera of the taxonomic family Fabaceae that produces large edible seeds or edible seedpods. 

verb
  • To hit deliberately with a projectile, especially in the head. 

read/write head

noun
  • A combination read head and write head 

How often have the words bean and read/write head occurred in a corpus of books? (source: Google Ngram Viewer )