unoften

Unoften, un-of′n, adv. not often.

Of Shakespeare, the greatest of all the poets in our language, let it be granted that he is not unoften one of the most careless and even most slovenly; but rarely is he so to the obscuring of his meaning, and never save casually, and in some brief passage.

No doubt Romola not unoften smells overmuch of the lamp, and in all probability will not permanently occupy the position assigned to it with characteristic over-confidence by contemporaneous enthusiasm.

I fear Burns indulged in most of the vices against which Cowper inveighs; and not unoften he glorified them in verse.

There was strength, but there was likewise rage; a fine frenzy—not unoften due mainly to its rapidity and to its being raised suddenly by his affections; there was  some confusion in the stream of his thoughts, some overflowing of the banks, some turbulence, and a certain noble immensity; but its origin was clear and calm, above the region of clouds and storms.