anxious vs nonchalant

anxious

adj
  • Accompanied with, or causing, anxiety; worrying. 

  • Having a feeling of anxiety or disquietude; extremely concerned, especially about something that will happen in the future or that is unknown. 

  • Earnestly desirous. 

  • Nervous and worried. 

nonchalant

adj
  • Indifferent; unconcerned; behaving as if detached. 

  • Casually calm and relaxed. 

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