alkali vs brine

alkali

noun
  • Soluble mineral matter, other than common salt, contained in soils of natural waters. 

  • One of a class of caustic bases, such as soda, soda ash, caustic soda, potash, ammonia, and lithia, whose distinguishing characteristics are dissolving in alcohol and water, uniting with oils and fats to form soap, neutralizing and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue. 

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. 

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