communion vs free grace

communion

noun
  • Holy Communion. 

  • A form of ecclesiastical unity between the Roman Church and another, so that the latter is considered part of the former. 

  • A joining together of minds or spirits; a mental connection. 

free grace

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

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