ageing vs elderly

ageing

noun
  • UK, Australia, and New Zealand standard spelling of aging. 

adj
  • UK, Australia, and New Zealand standard spelling of aging. 

elderly

noun
  • Older people as a whole. 

  • An elderly person. 

adj
  • old; having lived for relatively many years. 

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

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