inexorable vs negatory

inexorable

adj

  • Unable to be persuaded; relentless; unrelenting. 

  • Impossible to prevent or stop; inevitable. 

  • Adamant; severe. 

negatory

adj

  • Negative, negating. 

noun

  • No. 

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