elephant's teeth vs pearly

elephant's teeth

noun
  • ivory 

pearly

noun
  • A tooth. 

adj
  • Of a pale greyish white colour, tinted with blue. 

  • Containing or yielding pearls. 

  • Resembling or characteristic of a pearl; nacreous. 

  • Having a pure sweet tone. 

How often have the words elephant's teeth and pearly occurred in a corpus of books? (source: Google Ngram Viewer )