piff vs vex

piff

verb
  • To throw something vigorously. 

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

adj
  • good or attractive. 

noun
  • Piffle; nonsense; rubbish. 

vex

verb
  • To toss back and forth; to agitate; to disquiet. 

  • To twist, to weave. 

  • To cause (mental) suffering to; to distress. 

  • To annoy, irritate. 

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