percolate vs potable

percolate

noun
  • A liquid that has been percolated. 

verb
  • To pass a liquid through a porous substance; to filter. 

  • To make (coffee) in a percolator. 

  • To drain or seep through a porous substance. 

  • To spread slowly or gradually; to slowly become noticed or realised. 

potable

noun
  • Any drinkable liquid; a beverage. 

adj
  • Good for drinking without fear of disease or poisoning. 

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