Repeatedly:
— The unknown word turned up over and over again in the text.

synoniemen: again and again, over and over, time and again, time and time again.

Roget 104: repeatedly, often, again, anew, over again, afresh, once more; ding-dong, ditto, encore, de novo, bis^†, da capo [It].    again and again; over and over, over and over again; recursively [Comp.]; many times over; time and again, time after time; year after year; day by day &c.; many times, several times, a number of times; many a time, full many a time; frequently etc. 136.    ... meer laten zien