asperse vs catchment

asperse

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

  • To falsely or maliciously charge another; to slander. 

catchment

verb
  • To divide into catchment areas. 

noun
  • Any structure or land feature which catches and holds water; the collection of such water. 

  • A catchment area, or the people it serves. 

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