eldest vs of a former period

eldest

adj
  • (of a hand) Having higher, or superior cards. 

  • (of a player) Receiving cards from the dealer first, before any other players. 

noun
  • The eldest child in a family, or individual in a group. 

of a former period

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