geriatric vs whitebeard

geriatric

noun

  • An old person. 

adj

  • Relating to geriatrics. 

  • Relating to the elderly. 

  • Elderly, old. 

whitebeard

noun

  • An old man; a greybeard. 

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