severe vs solemn

severe

adj
  • Very bad or intense. 

  • Sober, plain in appearance, austere. 

  • Strict or harsh. 

solemn

adj
  • Deeply serious and sombre; grave. 

  • 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. 

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