unintermittently

For fifteen centuries before the last, it was erroneously supposed that all maladies lay in the humours of the body; and hence blood-letting was practised periodically to prevent disease, and almost unintermittently to cure it, though such treatment could only be right in a few out of many cases.

1834 January 4, “Is Ignorance Bliss?”, in William Chambers, Robert Chambers, editors, Chambers’ Edinburgh Journal, volume II, number 101, page 386, column 2

I was once in the Grand Hôtel during the usual “exceptional season,” when it rained unintermittently for a fortnight; the place was empty; “tristeful,” as Adolf styled it.

1892 September 3, “Inns and Outs. No. II.—The Head-Wetter.”, in Punch, or The London Charivari, volume CIII, London: […] [T]he Office, […], page 105, column 2

It retains only those miracles which are symbols of a continuous permanent miracle, through which the Saviour of the World works constantly, unintermittently, among men.

1910, Albert Schweitzer, “The Lives of Jesus of the Earlier Rationalism”, in W[illiam] Montgomery, transl., The Quest of the Historical Jesus: A Critical Study of Its Progress from Reimarus to Wrede, London: Adam and Charles Black, page 35