antinomy vs contraposition

antinomy

noun

  • Any contradiction or paradox. 

  • In the thought of the German philosopher Immanuel Kant (1724–1804): an apparent contradiction between valid conclusions; a paradox. 

contraposition

noun

  • Opposition; contrast. 

  • The statement of the form "if not Q then not P", given the statement "if P then Q". 

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