ey vs ze

ey

pron
  • A gender-neutral third-person singular subject pronoun, one of the so-called Spivak pronouns, equivalent to the singular they and coordinate with gendered pronouns he and she. 

noun
  • A small island formed by the buildup of silt or gravel at the confluence of two rivers or streams. 

  • A place that has a name ending in "-ey" because it is or was located at such an island. 

ze

pron
  • a gender-neutral third-person singular subject pronoun, equivalent to singular they, and coordinate with gendered pronouns he and she. 

noun
  • The name of the Cyrillic script letter З / з. 

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