dodo vs museum piece

dodo

noun
  • A person or organisation which is very old or has very old-fashioned views or is not willing to change and adapt. 

  • Fried plantain. 

  • A large, flightless bird, †Raphus cucullatus, related to the pigeon, that is now extinct (since the 1600s) and was native to Mauritius. 

museum piece

noun
  • A very old item, especially an obsolete piece of technology. 

How often have the words dodo and museum piece occurred in a corpus of books? (source: Google Ngram Viewer )