drench vs humify

drench

noun
  • A draught administered to an animal. 

verb
  • To soak, to make very wet. 

  • To cause to drink; especially, to dose (e.g. a horse) with medicine by force. 

humify

verb
  • To convert into humus. 

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