privative vs ungrounded

privative

adj
  • indicating the absence of something 

  • causing privation; depriving 

  • consisting in the absence of something; negative 

noun
  • something that causes privation or indicates an absence 

ungrounded

adj
  • Not grounded; without ground or basis, unreal, false. 

  • Not connected to ground potential 

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