dump on vs offend

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). 

offend

verb
  • To hurt the feelings of; to displease; to make angry; to insult. 

  • To transgress or violate a law or moral requirement. 

  • To feel or become offended; to take insult. 

  • To physically harm, pain. 

  • To annoy, cause discomfort or resent. 

  • To sin, transgress divine law or moral rules. 

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