gloomy vs rocking

gloomy

adj
  • Suffering from gloom; melancholy; dejected. 

  • Not very illuminated; dim because of darkness, especially when appearing depressing or frightening. 

noun
  • Someone or something that is gloomy or pessimistic. 

rocking

adj
  • Shaking, swaying or moving back and forth. 

  • Excellent; great. 

noun
  • The abrading of a copper plate with a rocker, preparatory to mezzotinting. 

  • The motion by which the design on a steel mill is transferred to a copper cylinder. 

  • The motion of something that rocks. 

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