brine vs caustic soda

brine

noun
  • Salt water; water saturated or strongly impregnated with salt; a salt-and-water solution for pickling. 

  • The sea or ocean; the water of the sea. 

verb
  • To prepare and flavor food (especially meat) for cooking by soaking in a salt solution. 

  • To preserve food in a salt solution. 

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 brine and caustic soda occurred in a corpus of books? (source: Google Ngram Viewer )