lame duck vs pelf

lame duck

noun
  • A person or thing that is helpless, inefficient, or disabled. 

  • An elected official who has lost the recent election or is not eligible for reelection and is marking time until leaving office. 

pelf

noun
  • A contemptible or useless person. 

  • Dust; fluff. 

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