gravity vs solemnity

gravity

noun
  • The state or condition of being grave; seriousness. 

  • The lowness of a note. 

  • Specific gravity. 

  • The state or condition of having weight; weight; heaviness. 

  • Gravitation, the universal force exercised by two bodies onto each other. 

  • The force at the Earth's surface, of the attraction by the Earth's masses, and the centrifugal pseudo-force caused by the Earth's rotation, resulting from gravitation. 

solemnity

noun
  • The quality of being deeply serious and sober or solemn. 

  • A solemn or formal observance; proceeding according to due form; the formality which is necessary to render a thing done valid. 

  • A feast day of the highest rank celebrating a mystery of faith such as the Trinity, an event in the life of Jesus, the Virgin Mary, or another important saint. 

  • An instance or example of solemn behavior; a rite or ceremony performed with reverence. 

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