Thomas S. Kuhn, both in his Second Thoughts on Paradigms  and in the Postscript to the second edition of The Structure of Scientific Revolutions , refers to someone who found 22 different uses of the term "paradigm".
On the other hand, Margaret Masterman few years before drew up an index which showed 21 uses of "paradigm", saying that they could be even more than 21 (see M.Masterman, The Nature of a Paradigm, in Criticism and the Growth of Knowledge - Proceedings of the International Colloquium in the Philosophy of Science, London, 1965).
Is Kuhn referring to M.Masterman's analysis? If so, why does he mention 22 different uses of paradigm instead than 21? Or is Kuhn referring to another critic?