Adam's ale vs H₂O

Adam's ale

noun

  • Water. 

H₂O

noun

  • Water as a chemical substance. 

  • Hishammuddin Hussein Onn, Malaysian politician and son of Hussein Onn, third prime minister of Malaysia. 

How often have the words Adam's ale and H₂O occurred in a corpus of books? (source: Google Ngram Viewer )