Here's the context:
It looks to me like "oscillationis" is a third declension adjective in the genitive modifying "pestilentiae". Would it be correct to understand this as a recurring pestilence (a pestilence that oscillates)?Quo responso de pastoribus supplicium sumpserunt et Erigonae diem festum oscillationis pestilentiae causa instituerunt et ut per vindemiam de frugibus Icario et Erigonae primum delibarent.
Thanks.
-Yvonne