impediment vs nonfulfillment

impediment

noun
  • A hindrance; that which impedes or obstructs progress. 

  • Baggage, especially that of an army; impedimenta. 

  • A disability, especially one affecting the hearing or speech. 

nonfulfillment

noun
  • The failure to fulfil an obligation. 

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