furtherance vs moratorium

furtherance

noun
  • Promotion. 

  • Advancement or progress. 

  • The act of furthering or helping forward 

moratorium

noun
  • An authorization to a debtor, permitting temporary suspension of payments. 

  • A suspension of an ongoing activity. 

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