per vs ze

per

pron
  • They (singular). Gender-neutral neologistic third-person singular subject pronoun, coordinate with gendered pronouns he and she. 

  • Them (singular) Neologistic gender-neutral third-person singular object pronoun, suggested for use in place of him and her. 

prep
  • In accordance with, as per 

  • For each. 

  • By the, by means of the, via the, through the. 

  • To each, in each (used in expressing ratios of units). 

adj
  • Belonging to per, their (singular). Gender-neutral third-person singular possessive adjective, coordinate with gendered his and her. 

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 per and ze occurred in a corpus of books? (source: Google Ngram Viewer )