sluggish vs yawning

sluggish

adj
  • Characteristic of a sluggard; dull; stupid; tame; simple. 

  • Habitually idle and lazy; slothful; dull; inactive 

  • Having no power to move oneself or itself; inert. 

  • Exhibiting economic decline, inactivity, slow or subnormal growth. 

  • Slow; having little motion. 

yawning

adj
  • That yawns or yawn. 

  • Wide open. 

noun
  • The action of the verb yawn. 

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