percolate vs submerge

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. 

submerge

verb
  • To put into a liquid; to immerse; to plunge into and keep in. 

  • To sink out of sight. 

  • To engulf or overwhelm. 

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