chump change vs loose change

chump change

noun
  • A sum of money considered to be insignificant. 

  • An amount of remuneration, reward, or other monetary recompense considered to be insultingly small. 

loose change

noun
  • A sum of money considered small or insignificant. 

  • Coins of little value kept in one's pocket or bag. 

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