inextinguishable vs yielding

inextinguishable

adj

  • Incapable of being extinguished, not extinguishable. 

yielding

noun

  • A concession. 

adj

  • Docile, or inclined to give way to pressure. 

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