deluge vs outflow

deluge

noun
  • A system for flooding or drenching a space, container, or area with water in an emergency to prevent or extinguish a fire. 

  • A great flood or rain. 

  • An overwhelming amount of something; anything that overwhelms or causes great destruction. 

verb
  • To flood with water. 

  • To overwhelm. 

outflow

noun
  • The part of a system that allows material to flow out. 

  • Any outward movement. 

  • Something that flows out of a sewage treatment plant. 

  • The process of flowing out. 

  • A fluid that flows out. 

  • A stream of gaseous material emanating from an active galactic nucleus. 

verb
  • To flow outward. 

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