percolate vs waterer

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. 

waterer

noun
  • A device used for watering. 

  • A device from which livestock, poultry, or pets may drink. 

  • One who waters plants. 

  • One who waters down, or dilutes, something. 

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