gush vs outflow

gush

noun
  • A sudden rapid outflow. 

verb
  • To make an excessive display of enthusiasm, praise, or sentiment. 

  • To send (something) flowing forth suddenly in great volume. 

  • To ejaculate during orgasm. 

  • To flow forth suddenly, in great volume. 

outflow

noun
  • The process of flowing out. 

  • Any outward movement. 

  • Something that flows out of a sewage treatment plant. 

  • A fluid that flows 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 gush and outflow occurred in a corpus of books? (source: Google Ngram Viewer )