pakapoo vs sweepstake

pakapoo

noun
  • A Chinese lottery game popular in Oceania in the 19th century, involving tickets marked with rows of Chinese characters. 

sweepstake

noun
  • A lottery in which the prize or prizes constitute all the money paid by the participants. 

  • A prize draw. 

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