strong-willed vs submissive

strong-willed

adj

  • Having a vigorous, independent will 

submissive

adj

  • Meekly obedient or passive. 

noun

  • One who submits. 

  • One who submits to a dominant partner in BDSM practices. 

How often have the words strong-willed and submissive occurred in a corpus of books? (source: Google Ngram Viewer )