offend vs rub salt in the wound

offend

verb
  • To physically harm, pain. 

  • To transgress or violate a law or moral requirement. 

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

  • To feel or become offended; to take insult. 

  • To annoy, cause discomfort or resent. 

  • To sin, transgress divine law or moral rules. 

rub salt in the wound

verb
  • To make an injury, physical or emotional, feel worse. 

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