geriatric vs used-to-be

geriatric

adj

  • Elderly, old. 

  • Relating to geriatrics. 

  • Relating to the elderly. 

noun

  • An old person. 

used-to-be

adj

  • Former, ex-. 

How often have the words geriatric and used-to-be occurred in a corpus of books? (source: Google Ngram Viewer )