grieve vs rub salt in the wound

grieve

verb
  • To cause sorrow or distress to. 

  • To submit or file a grievance (about). 

  • To feel very sad about; to mourn; to sorrow for. 

  • To experience grief. 

noun
  • A manager or steward, e.g. of a farm. 

rub salt in the wound

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

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