pff vs you know

pff

intj
  • An expression of annoyance or disappointment. 

  • A dismissive response to a ridiculous comment. 

  • The sound made whilst blowing a raspberry. 

  • An expression of laughter. 

you know

intj
  • Expression signifying a pause or hesitation. 

  • Expression used to imply meaning, rather than say it, such as when a person is embarrassed. 

  • Used other than figuratively or idiomatically: see you, know. 

  • Used as a rhetorical question to confirm agreement, knowing or understanding at the end of a statement. 

  • Used to introduce information. 

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