privet vs what's going on

privet

intj
  • hello, hi 

noun
  • Any of various shrubs and small trees in the genus Ligustrum. 

what's going on

intj
  • An informal greeting. 

  • Expression of concern, asking for an explanation 

How often have the words privet and what's going on occurred in a corpus of books? (source: Google Ngram Viewer )