percolate vs river

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. 

river

noun
  • Any large flow of a liquid in a single body. 

  • The last card dealt in a hand. 

  • One who rives or splits. 

  • A large and often winding stream which drains a land mass, carrying water down from higher areas to a lower point, oftentimes ending in another body of water, such as an ocean or in an inland sea. 

  • A visually undesirable effect of white space running down a page, caused by spaces between words on consecutive lines happening to coincide. 

verb
  • To improve one’s hand to beat another player on the final card in a poker game. 

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