duh vs horsefeathers

duh

intj
  • Disdainful indication that something is obvious. 

  • Indication of mock stupidity. 

horsefeathers

intj
  • Indicates disbelief. 

noun
  • Nonsense; indicates disbelief. 

  • Feathering strips. 

  • Long hair on lower legs of a draft horse (e.g., Clydesdale), especially the rear legs. 

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