polaroid vs press stud

polaroid

noun
  • A print from such a camera. 

  • Polaroid sunglasses. 

  • A sheet of plastic embedded with microscopic crystals of herapathite or similarly acting material, so that light passing through it is polarised. 

  • A camera that develops its own film. 

verb
  • To photograph with a polaroid camera. 

press stud

noun
  • A snap fastener. 

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