pusillanimity vs weak-mindedness

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. 

weak-mindedness

noun
  • The state or quality of being weak-minded. 

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