oldtimer vs twirly

oldtimer

noun

  • An elderly person. 

  • A vintage car. 

  • A veteran. 

twirly

noun

  • an old age pensioner or other elderly person, especially one using public transport. 

adj

  • coiled or curly 

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