cerebrum vs peduncle

cerebrum

noun
  • The principal and most anterior part of the brain in vertebrates, which is located in the front area of the skull and divided into two hemispheres, left and right, separated by a fissure. In humans it is the largest part of the brain and is responsible for the integration of complex sensory functions and the initiation and coordination of voluntary activity, and the higher mental functions such as consciousness, thought, reason, emotion, and memory. 

peduncle

noun
  • A bundle of neurons connecting different parts of the brain. 

  • A short stalk at the base of a leaf or reproductive structure. 

  • In vertebrates, the base of any relatively massive anatomical member connected to the body by a narrower section. Cf. caudal peduncle of fishes. 

  • A stem attaching a mass of tissue (such as a polyp) to the body. 

  • The axis of an inflorescence; the stalk supporting an inflorescence. 

  • A collection of nerves in the appendage of an animal (such as the tip of a dolphin's tail). 

  • In arthropods, the base segments of an antenna or stalk-like structures such as the peduncles of some barnacles 

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