pho vs pshaw

pho

noun
  • A Vietnamese soup with a beef base, typically served with rice noodles and beef or chicken. 

pshaw

verb
  • To express disgust or contempt by saying "pshaw". 

intj
  • Indicating disapproval, scoffery, irritation, impatience or disbelief. 

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