free grace vs justification

free grace

noun
  • A concept of grace as a gift given freely by God, without regard to entitlement or merit. 

justification

noun
  • The forgiveness of sin. 

  • A reason, explanation, or excuse which someone believes provides convincing, morally acceptable support for behavior or for a belief or occurrence. 

  • The alignment of text to the left margin (left justification), the right margin (right justification), or both margins (full justification). 

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