keeve vs sitz bath

keeve

noun
  • A large vat used in dressing ores. 

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

  • A bleaching vat; a kier. 

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

  • To heave; to tilt, as a cart. 

sitz bath

noun
  • A hydrotherapeutic bath taken in a sitting position. 

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