neither vs nother

neither

pron

  • Not either one of two. 

adv

  • Similarly not. 

det

  • Not one of two; not either. 

  • Not either (used with nor). 

nother

pron

  • Neither. 

adj

  • Neither. 

  • Different, other. 

How often have the words neither and nother occurred in a corpus of books? (source: Google Ngram Viewer )