ageing vs superannuated

ageing

adj

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

noun

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

superannuated

adj

  • Retired or discarded due to age. 

  • Obsolete, antiquated. 

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