larynx vs oesophagus

larynx

noun
  • A hollow muscular organ of the neck of mammals situated just below where the tract of the pharynx splits into the trachea and the oesophagus. It is involved in breath control and protection of the trachea, and, because it houses the vocal cords, sound production. 

  • Meronyms: epilarynx, hypolarynx, orolarynx 

oesophagus

noun
  • The tube that carries food from the pharynx to the stomach. 

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