Which preposition to use with appetencies

in Occurrences 1%

This disposition of the semi- coriaceous leaves, a little silvery beneath and more than two feet long, makes the branches bend down toward the ground, like the fronds of the palm-trees.' 'The Capuchin monkeys,' he continues, 'are singularly fond of these "chestnuts of Brazil," and the noise made by the seeds, when the fruit is shaken as it fell from the tree, excites their appetency in the highest degree.'

Which preposition to use with  appetencies