blessing vs saving grace

blessing

noun
  • Some kind of divine or supernatural aid, or reward. 

  • A pronouncement invoking divine aid. 

  • Good fortune. 

  • A modern pagan ceremony. 

  • The act of declaring or bestowing favor; approval. 

  • A group of unicorns. 

  • A prayer before a meal; grace. 

  • Something someone is glad of. 

saving grace

noun
  • God's grace or blessing, enabling sinners to attain salvation. 

  • A redeeming quality or factor. 

How often have the words blessing and saving grace occurred in a corpus of books? (source: Google Ngram Viewer )