boiler vs keeve

boiler

noun
  • A kitchen vessel for steaming, boiling or heating food. 

  • An old woman. 

  • A device consisting of a heat source and a tank for storing hot water, typically for space heating, domestic hot water etc., disregarding the source of heat. 

  • A sunken reef, especially a coral reef, on which the sea breaks heavily. 

  • A person who boils something. 

  • A steam boiler. 

  • An apparatus for heating circulating water or other heat transferring liquid. 

  • Boilerplate. 

  • A tough old chicken only suitable for cooking by boiling. 

keeve

noun
  • A vat or tub in which the mash is made; a mash tub. 

  • A large vat used in dressing ores. 

  • A bleaching vat; a kier. 

verb
  • To set in a keeve, or tub, for fermentation. 

  • To heave; to tilt, as a cart. 

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