1. In a gradual manner
   - gradually, bit by bit 
2. Proceeding in steps
   - stepwise

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

See also: gradual

Encyclopedia: Step by step

• Cowper
• Cowper's gland
• cowpie
• cowpoke
• cowpox
• cowpuncher
• cowrie
• cowry
• cows
• cows' milk
• cowshed
• cowskin
• cowslip
• cowtown
• cox
• Cox's Orange Pippin
• Cox-1
• Cox-2
• Cox-2 inhibitor
• coxa
• coxcomb
• coxsackievirus
• coxswain
• coy
• coydog