cottonmouth vs hydrate

cottonmouth

noun
  • A snake, Agkistrodon contortrix mokasen, the northern copperhead. 

  • An oral dryness often associated with certain medicines and recreational drugs. 

  • A snake, Agkistrodon piscivorus, the water moccasin. 

hydrate

noun
  • Water. 

  • A solid compound containing or linked to water molecules. 

verb
  • To load data from a database record into an object's variables 

  • To drink water. 

  • To take up, consume or become linked to water. 

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