pusillanimity vs single-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. 

single-mindedness

noun
  • The property of being single-minded. 

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