absolution vs nihil obstat

absolution

noun
  • An absolving of sins from ecclesiastical penalties by an authority. 

  • An absolving, or setting free from guilt, sin, or penalty; forgiveness of an offense. 

  • The form of words by which a penitent is absolved. 

  • The forgiveness of sins, in a general sense. 

nihil obstat

noun
  • A declaration of no objection; (specifically) a declaration used by the Catholic Church to indicate a book, initiative, or appointment to an office has been found to not breach religious or moral norms. 

How often have the words absolution and nihil obstat occurred in a corpus of books? (source: Google Ngram Viewer )