arousal vs encouragement

arousal

noun
  • The act of arousing or the state of being aroused. 

  • A physiological and psychological state of being awake or reactive to stimuli, including elevated heart rate and blood pressure and a condition of sensory alertness, mobility and readiness to respond. 

  • Arousal from sleep or hibernation. 

  • Sexual arousal. 

encouragement

noun
  • The act of encouraging 

  • Words or actions that increase someone's confidence 

  • Something that incites, supports, promotes, protects or advances; incentive 

  • The feeling of being encouraged 

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