noncompact vs rarefied

noncompact

adj
  • Not compact. 

rarefied

adj
  • Less dense than usual; thin. 

  • Distant from the lives and everyday concerns of ordinary people; esoteric, exclusive, select. 

  • Elevated in style or nature, sublime; of high intellectual or moral value. 

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