carbonation vs caustic soda

carbonation

noun
  • The state of having carbon dioxide gas dissolved in a liquid. 

  • The amount or level of dissolved carbon dioxide remaining in solution. 

  • The replacement of calcium hydroxide with calcium carbonate triggered by a chemical reaction. 

  • Carbonization. 

caustic soda

noun
  • sodium hydroxide (NaOH), a strong alkaline substance used in the manufacture of paint, soap and detergents, or as a drain cleaner. 

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