magnify vs rub salt in the wound

magnify

verb
  • To make (something) larger or more important. 

  • To make (something) appear larger by means of a lens, magnifying glass, telescope etc. 

  • To praise, glorify (someone or something, especially God). 

  • To make (someone or something) appear greater or more important than it is; to intensify, exaggerate. 

rub salt in the wound

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

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