percolate vs waterlog

percolate

verb
  • To drain or seep through a porous substance. 

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

  • To make (coffee) in a percolator. 

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

noun
  • A liquid that has been percolated. 

waterlog

verb
  • To saturate with water. 

  • To make (a boat) heavy and in danger of sinking by flooding it with water. 

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