doom and gloom vs encouraging

doom and gloom

noun

  • Something considered indicative of feelings of pessimism and despair. 

encouraging

noun

  • encouragement 

adj

  • supporting by giving encouragement 

  • giving courage, confidence or hope 

  • auspicious, or bringing good luck 

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