Which preposition to use with spurnings

of Occurrences 4%

229; Prince's Digest, 446, &c.] From the nature of the casefrom the laws of mind, such power, so intensely desired, griped with such a death-clutch, and with such fierce spurnings of all curtailment or restraint, cannot but be abused.

at Occurrences 1%

Dost thou not blush young Shepherd to be known, Thus without care, leaving thy flocks alone, And following what desire and present blood Shapes out before thy burning sense, for good, Having forgot what tongue hereafter may Tell to the World thy falling off, and say Thou art regardless both of good and shame, Spurning at Vertue, and a vertuous Name,

Which preposition to use with  spurnings