percolate vs saturate

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. 

saturate

verb
  • To cause to become completely impregnated, or soaked (especially with a liquid). 

  • To fill to excess. 

  • To satisfy the affinity of; to cause a substance to become inert by chemical combination with all that it can hold. 

  • To render pure, or of a colour free from white light. 

noun
  • Something saturated, especially a saturated fat. 

adj
  • Very intense. 

  • Saturated; wet. 

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