heist vs purloin

heist

verb
  • To steal, rob, or hold up (something). 

noun
  • A robbery or burglary, especially from an institution such as a bank or museum. 

  • A fiction genre in which a heist is central to the plot; a work in such a genre. 

purloin

verb
  • To commit theft; to thieve. 

  • To take the property of another, often in breach of trust; to appropriate wrongfully; to steal. 

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