Seasonably

[H]aving very long suspended our conference about the freshly mention'd Subject, it was so newly begun when you came in, that we shall scarce need to repeat any thing to acquaint you With what has pass'd betwixt us before your arrival, so that I cannot but look upon it as a fortunate Accident that you should come so seasonably, to be not hearers alone, but we hope Interlocutors at our conference.

[…] I ſuppoſe we may now ſeaſonably proceed to conſider the Style of the Scripture: A Subject that will as well require as deſerve ſome Time and much Attention; […]

[W]hilst I vvas thus muſing, and attentively looking upon the VVater, to try vvhether I could diſcover the Bottom, it happened to me, as it often does to thoſe that gaze too ſtedfaſtly on ſvvift Streams, that my Head began to grovv giddy, and my Leggs to ſtagger tovvards the River, into vvhich queſtionleſs I had fell, if Philaretus had not ſeaſonably and obligingly prevented it.

What matters me who wears the crown of France? / Whether a Richard or a Charles possess it? / They reap the glory—they enjoy the spoil— / We pay—we bleed!—The sun would shine as cheerly, / The rains of heaven as seasonably fall, / Tho' neither of these royal pests existed.

The weather has become seasonably cooler lately.

2005: Uniform Commercial Code § 1-204(3). The American Law Institute and the National Conference of Commissioners on Uniform State Laws. An action is taken "seasonably" when it is taken at or within the time agreed or if no time is agreed at or within a reasonable time.