flimsy vs ungrounded

flimsy

adj
  • Weak; ill-founded. 

  • Likely to bend or break under pressure. 

noun
  • A banknote. 

  • Skimpy underwear. 

  • A service certificate 

  • Thin typing paper used to make multiple copies. 

ungrounded

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

  • Not connected to ground potential 

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