privative vs refusal

privative

noun
  • something that causes privation or indicates an absence 

adj
  • causing privation; depriving 

  • consisting in the absence of something; negative 

  • indicating the absence of something 

refusal

noun
  • The act of refusing. 

  • Depth or point at which well or borehole drilling cannot continue. 

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