Voltaic vs fierce

Voltaic

adj
  • Of or pertaining to Alessandro Volta or his work. 

  • Of or pertaining to Gur languages of Africa, from Niger-Congo family. 

  • Of or pertaining to Burkina Faso, previously known as Upper Volta. 

noun
  • A person from Upper Volta. 

fierce

adj
  • Excellent, very good. 

  • Exceedingly violent, severe, ferocious, cruel or savage. 

  • Resolute or strenuously active. 

  • Of exceptional quality, exhibiting boldness or chutzpah. 

  • Threatening in appearance or demeanor. 

adv
  • Extremely; very. 

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