Intermittently.

Roget 608: by fits and starts, without rhyme or reason.   

Roget 684: with haste, with all haste, with breathless speed; in haste etc. adj.; apace etc. (swiftly) 274; amain^†; all at once etc. (instantaneously) 113; at short notice &c.; immediately etc. (early) 132; posthaste; by cable, by express, by telegraph, by forced marches.    hastily, precipitately etc. adj.; helter-skelter, hurry-skurry^†, holus-bolus; slapdash, slap-bang; full-tilt, full drive; heels over head, head and shoulders, headlong, a corps perdu [Fr.].    by fits and starts, by spurts; hop skip and jump.    ... meer laten zien

Roget 315: by fits and starts; subsultorily^† etc. adj.^†; per saltum [Lat.]; hop skip and jump; in convulsions, in fits.   

Roget 139: irregularly etc. adj.; by fits and starts etc. (discontinuously) 70.   

Roget 70: at intervals; by snatches, by jerks, by skips, by catches, by fits and starts; skippingly^†, per saltum [Lat.]; longo intervallo [It].   

Roget 59: irregularly etc. adj.; by fits, by fits and snatches, by fits and starts; pellmell; higgledy-piggledy; helter-skelter, harum-scarum; in a ferment; at sixes and sevens, at cross-purposes; upside down etc. 218.    ... meer laten zien