%obvention%

n. [ L. obvention, fr. obvenire to come before or in the way of, to befall; ob (see Ob-) + venire to come: cf. F. obvention. ] The act of happening incidentally; that which happens casually; an incidental advantage; an occasional offering. [ Obs. ] “Tithes and other obventions.” Spenser. [ 1913 Webster ]

Legacies bequeathed by the deaths of princes and great persons, and other casualities and obventions. Fuller. [ 1913 Webster ]