Which preposition to use with fluidity

of Occurrences 6%

In fine, monopolies, or competition in trade, appear to be recurrent social phases which depend upon the ratio which the mass and the fluidity of capital, or, in other words, its energy, bears to the area within which competition is possible.

from Occurrences 1%

The phrases purled with diabolical fluidity from her lips, searing like molten metal.

in Occurrences 1%

Coming as it did, a mysterious fluidity in the midst of vast plains of solid ice, it was well calculated to arouse emotions of the highest order; and I do not believe there was a man among us who did not long for the means of embarking upon its bright and lonely waters.

Which preposition to use with  fluidity