old-age pensioner vs silver top

old-age pensioner

noun
  • A person in receipt of an old age pension, a senior citizen. 

silver top

noun
  • An old person. 

  • Full cream milk, normally homogenised and pasteurised, having a silvery top to the bottle. 

How often have the words old-age pensioner and silver top occurred in a corpus of books? (source: Google Ngram Viewer )