assertive vs servile

assertive

adj
  • Boldly self-assured; confident without being aggressive. 

servile

adj
  • Of or pertaining to a slave. 

  • Not belonging to the original root. 

  • Slavish or submissive. 

  • Not sounded, but serving to lengthen the preceding vowel, like the e in tune. 

noun
  • A slave; a menial. 

  • An element which forms no part of the original root. 

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