flippant vs solemn

flippant

adj
  • Showing disrespect through a casual attitude, levity, and a lack of due seriousness; pert. 

  • nimble; limber. 

solemn

adj
  • Inspiring serious feelings or thoughts; sombrely impressive. 

  • Characterized by or performed with appropriate or great ceremony or formality. 

  • Of or pertaining to religious ceremonies and rites; (generally) religious in nature; sacred. 

  • Deeply serious and sombre; grave. 

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