piff vs poo

piff

intj
  • An exclamation of annoyance or contempt; pish; pshaw. 

noun
  • Piffle; nonsense; rubbish. 

adj
  • good or attractive. 

verb
  • To throw something vigorously. 

poo

intj
  • Expressing annoyance, frustration, etc.: a minced oath for 'shit'. 

noun
  • Champagne. 

  • Cannabis resin. 

  • A poodle crossbreed. 

  • Feces. 

  • A piece of feces or an act of defecation. 

verb
  • To defecate. 

  • To dirty something with feces. 

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