anxiety vs contentment

anxiety

noun
  • An unpleasant state of mental uneasiness, nervousness, apprehension and obsession or concern about some uncertain event. 

  • An uneasy or distressing desire (for something). 

  • A state of restlessness and agitation, often accompanied by a distressing sense of oppression or tightness in the stomach. 

contentment

noun
  • The neurophysiological experience of satisfaction and being at ease in one's situation, body, and/or mind. 

  • happiness in one's situation; satisfaction 

  • The state or degree of being contented or satisfied. 

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