doo vs feces

doo

noun
  • feces, particularly that of a dog. 

intj
  • Used as a scat word in singing. 

feces

noun
  • Digested waste material (typically solid or semi-solid) discharged from a human or mammal's stomach to the intestines; excrement. 

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