risible vs solemn

risible

adj
  • Easily laughing; prone to laughter 

  • Provoking laughter; ludicrous; ridiculous; humorously insignificant 

  • Of or pertaining to laughter 

solemn

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

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

  • Inspiring serious feelings or thoughts; sombrely impressive. 

  • Deeply serious and sombre; grave. 

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