drench vs waterhole

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. 

waterhole

noun
  • A depression in which water collects, especially one where wild animals come to drink. 

  • A watering hole; a place where people meet to drink and talk. 

  • A part of the electromagnetic spectrum, between the regions where hydrogen and hydroxyl radiate, that is relatively quiet in terms of radio astronomy. 

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