privative vs uncongenial

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 

uncongenial

adj
  • Not pleasing; disagreeable. 

  • He found office life uncongenial, and eventually left the company. 

  • Incapable of being grafted. 

  • Not congenial, compatible or sympathetic. 

  • Not appropriate; unsuitable. 

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