centenarian vs geezer

centenarian

noun
  • One who or that which is at least 100 years old. 

adj
  • Aged 100 years or more; extremely old. 

  • Of or relating to centenarians or a centenary celebration. 

geezer

noun
  • An old person, usually a male, typically a cranky old man. 

  • Someone affable but morally dubious; a wide boy. 

  • Term of address for a male. 

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