anxious vs racing one’s motor

anxious

adj
  • 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. 

  • Accompanied with, or causing, anxiety; worrying. 

racing one’s motor

How often have the words anxious and racing one’s motor occurred in a corpus of books? (source: Google Ngram Viewer )