apple pear vs pear of anguish

apple pear

noun
  • A fruit of a northeast-Asian species of pear with a crisp, juicy texture and an apple-like shape. 

  • Pyrus pyrifolia, the tree that bears this fruit. 

pear of anguish

noun
  • choke pear 

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