razz vs sling off at

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). 

sling off at

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