inconstantly

I perceived her dimly, inconstantly, through the waves of blackness and unreality that were like the half-dreams that we have when lying a-doze.

The position assumed by the affected animal inconstantly varies with the location and nature of the injury and is not of particular importance in establishing a diagnosis.

"Half-husband I trow, and half daddy,   As humour inconstantly leans; The man must be patient and steady,   That weds with a lass in her teens."