Which preposition to use with equability

of Occurrences 10%

Even the poetry of Dryden, with its reflections of the stormy days through which he had struggled, seemed to them, though gloriously leading the way toward perfection, to fall short of equability of temper and smoothness of form.

in Occurrences 1%

This is a very trifling percentage, and might be waived as not being a fraction sufficiently important to merit much attention; but we may frankly admit that these cases appear here, and are the result of a want of a perfect equability in the climate, and to this extent it must be held answerable.

throughout Occurrences 1%

For the reason that they are greatly changed in character, becoming mild and only pleasantly cool in temperature, offering no shock as a rule; and really the northeast trades, which almost daily blow, are the invigorating and healthful winds, sweeping away the miasma of the hot season, cooling the atmosphere, and preserving equability throughout the year.

Which preposition to use with  equability