anxious vs sleepless

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. 

sleepless

adj
  • Characterized by an absence of sleep. 

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