denticle vs teething

denticle

noun
  • A dentil. 

  • A pulp stone. 

  • Material serving as the dermis of sharks. 

  • A small tooth. 

teething

noun
  • The eruption, through the gums, of the milk teeth; dentition. 

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