privative vs unwilling

privative

adj

  • consisting in the absence of something; negative 

  • causing privation; depriving 

  • indicating the absence of something 

noun

  • something that causes privation or indicates an absence 

unwilling

adj

  • Not willing; reluctant 

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