dump on vs vituperate

dump on

verb
  • To complain to (someone) extensively; to (figuratively) transfer one's problems to (someone) by complaining to them. 

  • To finish a romantic relationship with (someone). 

vituperate

verb
  • To criticize (someone or something) in an abusive or harsh manner. 

  • To use abusive or harsh words. 

  • To attack (someone or something) with abusive language; to revile, to vilify. 

adj
  • Of, characterized by, or relating to abusive or harsh criticism. 

  • Which has been abusively or harshly criticized; also, deserving harsh criticism. 

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