carbonation vs potash

carbonation

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

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

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

  • Carbonization. 

potash

noun
  • An impure form of potassium carbonate (K₂CO₃) mixed with other potassium salts. 

  • A class of potassium minerals, of similar applicability to potassium carbonate, such as being a fertilizer. (ie. potassium chloride, potassium hydroxide) 

  • The water-soluble part of the ash formed by burning plant material; used for making soap and glass and as a fertilizer. 

verb
  • To treat with potassium. 

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