piff vs psht

piff

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

noun
  • Piffle; nonsense; rubbish. 

verb
  • To throw something vigorously. 

adj
  • good or attractive. 

psht

intj
  • Synonym of pshaw 

  • Synonym of scat 

  • Synonym of shh 

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