at haphazard, at intervals, at irregular intervals, at random, brokenly, by catches, by chance, by fits, by jerks, by skips, by snatches, capriciously, carelessly, desultorily, disconnectedly, discontinuously, eccentrically, erratically, flutteringly, haltingly, haphazardly, here and there, hit or miss, in snatches, in spots, inconstantly, indiscriminately, infrequently, intermittently, irregularly, jerkily, lurchingly, nonuniformly, occasionally, off and on, patchily, per saltum, promiscuously, quakingly, quaveringly, quiveringly, randomly, roughly, saltatorily, shakily, shudderingly, skippingly, sloppily, spasmodically, sporadically, spottily, tremblingly, tremulously, uncertainly, unevenly, unmethodically, unpredictably, unrhythmically, unsteadily, unsystematically, variably, waveringly, whimsically, willy-nilly, wobblingly