Difference between Pusillanimity and Pusillanimousness

What is the difference between Pusillanimity and Pusillanimousness?

Pusillanimity as a noun is 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. while Pusillanimousness as a noun is pusillanimity

We hope you now know whether to use Pusillanimity or Pusillanimousness in your sentence.