oldie vs period piece

oldie

noun
  • The genre of music composed of popular music from previous eras. 

  • Something or someone old. 

  • A song or record from a previous era. 

period piece

noun
  • A work of art or drama which evokes a particular historical era. 

  • A work which evokes the era in which it was produced, but may not have any other especial features. 

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