phrontistery vs polytechnic

phrontistery

noun
  • An establishment devoted to education or study. 

  • A place for thinking. 

  • The toilet; the lavatory. 

polytechnic

noun
  • A three-year post-secondary vocational training institute, equivalent of community college in the U.S. or TAFE in Australia. 

adj
  • that teaches applied arts, sciences, technology, engineering and other academic subjects 

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