chandoo vs ze

chandoo

noun
  • An extract or preparation of opium, used in China and India for smoking. 

ze

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

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

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