adv at intervals, bit by bit, by degrees, by fits and starts, fitfully, intermittently, little by little, partially, slowly
adj fragmentary, intermittent, interrupted, partial, patchy, spotty, unsystematic
English Collins Dictionary - English synonyms & Thesaurus
If you describe a change or process as piecemeal, you disapprove of it because it happens gradually, usually at irregular intervals, and is probably not satisfactory. adj usu ADJ n (disapproval)
...piecemeal changes to the constitution.
Piecemeal is also an adverb., adv ADV after v
The government plans to sell the railways piecemeal to the private sector...
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