eldest vs oldest

eldest

noun

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

adj

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

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

oldest

noun

  • The oldest child in a family, or individual in a group. 

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