confident vs servile

confident

adj
  • Very sure of something; positive. 

  • Self-assured, self-reliant, sure of oneself. 

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 confident and servile occurred in a corpus of books? (source: Google Ngram Viewer )