antediluvial vs elderly

antediluvial

adj
  • Antiquated. 

  • Of or pertaining to a time before Noah's flood. 

elderly

adj
  • Of an object, being old-fashioned or frail due to aging. 

  • old; having lived for relatively many years. 

noun
  • An elderly person. 

  • Older people as a whole. 

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