come to someone's rescue vs pull someone's bacon out of the fire

come to someone's rescue

verb
  • To rescue (or save) someone from further harm. 

pull someone's bacon out of the fire

verb
  • To rescue someone, especially at the last moment. 

How often have the words come to someone's rescue and pull someone's bacon out of the fire occurred in a corpus of books? (source: Google Ngram Viewer )