for good vs till death do us part

for good

prep
  • In a way that is conclusive and final. 

till death do us part

adv
  • Until death separates us; a common phrase said between the bride and the groom at a Christian wedding, indicating commitment to their union. 

How often have the words for good and till death do us part occurred in a corpus of books? (source: Google Ngram Viewer )