obstinacy vs pusillanimity

obstinacy

noun
  • The state, or an act, of stubbornness or doggedness. 

pusillanimity

noun
  • The quality or state of being pusillanimous; the vice of being timid and cowardly, and thus not living up to one's full potential; pusillanimousness. 

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