duffer vs lame duck

duffer

noun
  • An incompetent, indolent, or clumsy person. 

  • Any of various nymphalid butterflies of the genus Discophora. 

  • A player having little skill, especially a golfer who duffs. 

  • A racing pigeon that does not perform well. 

  • A cow that does not produce milk. 

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. 

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