nay vs ney

nay

adv
  • Or rather, or should I say; moreover (introducing a stronger and more appropriate expression than the preceding one). 

noun
  • A vote against. 

  • A person who voted against. 

ney

noun
  • A type of endblown flute. 

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