centenary vs elderly

centenary

adj
  • Lasting or aged 100 years, 100-year-old. 

  • Occurring every 100 years. 

noun
  • Synonym of hundredman: a position in the Anglo-Saxon kingdoms overseeing local administration. 

  • Synonym of centgrave: a position in the Frankish Empire overseeing local administration. 

  • Synonym of hundredweight, especially (historical) in Greek and Roman contexts. 

  • Synonym of centennial: a hundredth anniversary. 

elderly

adj
  • old; having lived for relatively many years. 

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

noun
  • An elderly person. 

  • Older people as a whole. 

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