centenarian vs dinosaur

centenarian

noun
  • One who or that which is at least 100 years old. 

adj
  • Aged 100 years or more; extremely old. 

  • Of or relating to centenarians or a centenary celebration. 

dinosaur

noun
  • Something or someone that is very old or old-fashioned, or is not willing to change and adapt. 

  • Any extinct reptile, not necessarily belonging to Dinosauria, that existed between about 230 million and 65 million years ago. 

  • any member of the clade Dinosauria other than birds. 

  • any of the animals belonging to the clade Dinosauria, especially those that existed during the Triassic, Jurassic and Cretaceous periods and are now extinct. 

  • Anything no longer in common use or practice. 

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