piss about vs razz

piss about

verb
  • to joke or play 

  • to misbehave; to act foolishly 

razz

verb
  • To tease playfully; to heckle. 

  • To heckle by blowing a raspberry. 

  • To drive an automobile around. 

noun
  • A version of seven card stud where the worst poker hand wins (called lowball). 

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