irresolution vs pusillanimity

irresolution

noun
  • Lack of resolution; lack of decision or purpose; vacillation. 

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 irresolution and pusillanimity occurred in a corpus of books? (source: Google Ngram Viewer )