detract vs dump on

detract

verb
  • To take credit or reputation from; to defame or decry. 

  • To take away; to withdraw or remove. 

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). 

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