diprotium monoxide vs moisture

diprotium monoxide

noun
  • A humorous chemical name for "water." 

moisture

noun
  • That which moistens or makes damp or wet; exuding fluid; liquid in small quantity. 

  • The state of being moist. 

  • Skin moisture noted as dry, moist, clammy, or diaphoretic as part of the skin signs assessment. 

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