advancement vs prepayment

advancement

noun
  • An advance of money or value; payment in advance. 

  • Property given, usually by a parent to a child, in advance of a future distribution. 

  • The act of advancing; promotion to a higher place or dignity 

  • The state of being advanced 

  • How advanced something is 

prepayment

noun
  • A payment in advance. 

  • An asset recognized in respect an expense incurred in a period for which the benefit will be received in a future period. 

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