Fiat vs pink slip

Fiat

noun

  • An automobile manufactured by the Italian firm Fiat S.p.A.. 

pink slip

noun

  • The title document for an automobile. 

  • Notice of termination of employment. 

  • An automobile roadworthiness inspection certificate. 

verb

  • To terminate the employment of. 

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