hydrate vs lactate

hydrate

verb
  • To drink water. 

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

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

noun
  • Water. 

  • A solid compound containing or linked to water molecules. 

lactate

verb
  • To secrete or produce milk 

noun
  • Any salt or ester of lactic acid 

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