brightness vs gloom

brightness

noun
  • The perceived luminance of an object. 

  • Intelligence, cleverness. 

  • The quality of being bright. 

gloom

noun
  • Darkness, dimness, or obscurity. 

  • Cloudiness or heaviness of mind; melancholy; aspect of sorrow; low spirits; dullness. 

  • A depressing, despondent, or melancholic atmosphere. 

  • A drying oven used in gunpowder manufacture. 

verb
  • To be dark or gloomy. 

  • To shine or appear obscurely or imperfectly; to glimmer. 

  • To fill with gloom; to make sad, dismal, or sullen. 

  • To look or feel sad, sullen or despondent. 

  • To render gloomy or dark; to obscure; to darken. 

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