artesian well vs outflow

artesian well

noun
  • An aquifer in which water rises to the surface under its own hydrostatic pressure. 

  • A bore-hole in an artesian basin. 

outflow

noun
  • A fluid that flows out. 

  • Any outward movement. 

  • Something that flows out of a sewage treatment plant. 

  • The process of flowing out. 

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

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

verb
  • To flow outward. 

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