aeriform vs lofty

aeriform

adj
  • Pertaining to air. 

  • Having a form similar to that of air. 

  • Light, unsubstantial, or unstable. 

lofty

adj
  • extremely proud; arrogant; haughty 

  • high, tall, having great height or stature 

  • idealistic, implying over-optimism 

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