lixiviate vs macerate

lixiviate

verb
  • To separate (a substance) into soluble and insoluble components through percolation; to leach. 

adj
  • Impregnated with salts from wood ashes. 

  • Of or relating to lye or lixivium; of the quality of alkaline salts. 

noun
  • leachate 

macerate

verb
  • To soften (something) or separate it into pieces by soaking it in a heated or unheated liquid. 

noun
  • A macerated substance. 

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