heist vs petty theft

heist

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. 

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

petty theft

noun
  • A theft of property having a value lower than a certain small amount set forth in a statute, and considered to be a less serious class of crime. 

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