drawing card vs shill

drawing card

noun
  • Synonym of drawcard (“something that attracts patronage to a place or an event”) 

shill

noun
  • A person paid to endorse a product while pretending to be impartial. 

  • Any person paid to endorse a product. 

  • An accomplice at a confidence trick during an auction or gambling game. 

  • A house player in a casino. 

verb
  • To promote or endorse in return for payment, especially dishonestly. 

  • To put under cover; to sheal. 

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