lastborn vs thumbling

lastborn

noun
  • The youngest child of a family. 

  • The youngest member of any company or organization. 

adj
  • Born last in a family; youngest in a the family. 

  • Younger than anyone else in a group. 

thumbling

noun
  • A tiny, thumb-sized person; manikin 

  • Anything small, comparable to the size of a human thumb 

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