piss off vs whistle in the wind

piss off

verb

  • To annoy, anger 

  • To leave, to go away. 

intj

  • Go away! 

whistle in the wind

verb

  • To attempt something that is futile; to say something that is not heeded. 

How often have the words piss off and whistle in the wind occurred in a corpus of books? (source: Google Ngram Viewer )