billabong vs influent

billabong

noun
  • An anabranch, backwater or oxbow lake that is temporarily cut off from the main river, especially one that is only filled with water during the rainy season and can sometimes dry up completely. 

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 billabong and influent occurred in a corpus of books? (source: Google Ngram Viewer )