paction vs proposal

paction

noun
  • A pact, an agreement. 

verb
  • To form a pact; to make a binding agreement. 

proposal

noun
  • The offer by a party of what he has in view as to an intended business transaction, which, with acceptance, constitutes a contract. 

  • The terms or conditions proposed 

  • A scheme or design 

  • The document on which such a thing is written. 

  • The act of asking someone to be one's spouse; an offer of marriage 

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