Elaina vs Yelena

Elaina

name

  • A female given name from Ancient Greek, of modern usage, variant of Elaine. 

Yelena

name

  • A transliteration of the Russian female given name Еле́на (Jeléna), equivalent to Helen. 

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