obstinate vs servile

obstinate

adj
  • Stubbornly adhering to an opinion, purpose, or course, usually with implied unreasonableness; persistent. 

  • Typical of an obstinate person; fixed and unmoving. 

  • Not easily subdued or removed. 

servile

noun
  • A slave; a menial. 

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

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. 

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