Use "jocosity" in a sentence

1. But the new member was, in some points, not of so tractable a nature as many of his predecessors had been; and notwithstanding all the couthy jocosity and curry-favouring of his demeanour towards us before the election, he was no sooner returned, than he began, as it were, to snap his fingers in the very faces of those of the council to whom he was most indebted, which was a thing not of very easy endurance, considering how they had taxed their consciences in his behalf; and this treatment was the more bitterly felt, as the old member had been, during the whole of his time, as considerate and obliging as could reasonably be expected; doing any little job that needed his helping hand when it was in his power, and when it was not, replying to our letters in a most discreet and civil manner