creature vs organism

creature

noun
  • A living being; an animal. 

  • A being subservient to or dependent upon another. 

  • A human. 

  • A created thing, whether animate or inanimate; a creation. 

  • An unidentified, mysterious, and often monstrous animal or being. 

organism

noun
  • A discrete and complete living thing, such as animal, plant, fungus or microorganism. 

  • Something with many separate interdependent parts, seen as being like a living thing; an organic system. 

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