bird of ill omen vs gloomy Gus

bird of ill omen

noun

  • A person who brings bad news 

gloomy Gus

noun

  • A person with a sullen, unhappy appearance or demeanor; a person with a pessimistic outlook. 

How often have the words bird of ill omen and gloomy Gus occurred in a corpus of books? (source: Google Ngram Viewer )