chamberlain vs stableman

chamberlain

noun
  • A senior royal official in charge of superintending the arrangement of domestic affairs and often charged with receiving and paying out money kept in the royal chamber, especially in the United Kingdom and in Denmark. 

  • A high officer of state, as currently with the papal camerlengo, but normally now a mainly honorary title. 

stableman

noun
  • A person employed to take care of horses in a stable. 

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