lame duck vs meathead

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. 

meathead

noun
  • An ungainly, dull or stupid person; someone who is lazy, disrespectful and/or whose beliefs and philosophies clash with another. 

  • A large, muscular, stupid man, especially an athlete. 

  • A member of the Canadian Forces Military Police. 

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