insect vs lame duck

insect

noun
  • A contemptible or powerless person. 

  • An arthropod (in the Insecta class) characterized by six legs, up to four wings, and a chitinous exoskeleton. 

  • Any small arthropod similar to an insect, including spiders, centipedes, millipedes, etc. 

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 insect and lame duck occurred in a corpus of books? (source: Google Ngram Viewer )