assertive vs submissive

assertive

adj

  • Boldly self-assured; confident without being aggressive. 

submissive

noun

  • One who submits. 

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

adj

  • Meekly obedient or passive. 

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