1. One thing at a time
   - in small stages, piecemeal, step-by-step, stepwise

1. A little bit at a time
   - piecemeal, little by little, in stages 
2. In a gradual manner
   - gradually, step by step

See also: gradual

• chase
• chase after
• chase away
• chased
• chaser
• Chasid
• Chasidic
• Chasidim
• Chasidism
• chasm
• chasse
• chasseur
• Chassid
• Chassidic
• Chassidim
• cochlear
• Cochlearia
• Cochlearia officinalis
• Cochlearius
• Cochlearius cochlearius
• cochon de lait
• Cochran
• cock
• cock a snook
• cock of the rock