percolate vs slush

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. 

slush

verb
  • To slosh or splash; to move as, or through, a slushy or liquid substance. 

  • To smear with slushy liquid or grease. 

  • To paint with a mixture of white lead and lime. 

noun
  • Liquid mud or mire. 

  • A soft mixture of grease and other materials, used for lubrication. 

  • Flavored shaved ice served as a drink. 

  • Half-melted snow or ice, generally located on the ground. 

  • A mixture of white lead and lime, used as a paint to prevent oxidation. 

  • Unsolicited manuscripts, as in slush pile. 

  • The refuse grease and fat collected in cooking, especially on shipboard. 

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