grounds vs percolate

grounds

noun
  • The sediment at the bottom of a liquid, or from which a liquid has been filtered. 

  • Basis or justification for something. 

  • The collective land areas that compose a larger area. 

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. 

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