asperse vs sparge

asperse

verb
  • To sprinkle or scatter (liquid or dust). 

  • To falsely or maliciously charge another; to slander. 

sparge

verb
  • To sprinkle or spray. 

  • To introduce bubbles into (a liquid). 

noun
  • Synonym of lautering 

adj
  • of something that sparges 

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