factious vs unreconcilable

factious

adj
  • Given to or characterized by discordance or insubordination. 

  • Of, pertaining to, or caused by factions. 

unreconcilable

adj
  • Irreconcilable. 

noun
  • A person or thing that cannot be reconciled. 

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