coulee vs influent

coulee

noun
  • A stream. 

  • A lava flow. 

  • A deep gulch or ravine, frequently dry in summer. 

  • A reach of water in a bayou that is like a slough but deeper. 

influent

noun
  • A stream which flows into another stream or a lake. 

  • An organism having an important effect on a plant or animal community. 

  • Fluids flowing in. 

adj
  • Flowing in. 

  • Exercising astral influence. 

  • Having an important effect on a plant or animal community. 

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