doo vs guano

doo

noun
  • feces, particularly that of a dog. 

intj
  • Used as a scat word in singing. 

guano

noun
  • Dung from a sea bird or from a bat. 

  • Coccothrinax borhidiana, a variety of palm tree indigenous to Cuba. 

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