Which preposition to use with excentricity

of Occurrences 2%

To us, however, at present, neither the morality nor the present mental excentricity of the capitalist is so material as the possibility of his acquiring flexibility under pressure, for it would seem to be almost mathematically demonstrable that he will, in the near future, be subjected to a pressure under which he must develop flexibility or be eliminated.

Which preposition to use with  excentricity