Related Clues:

• Hit-or-miss
• Like lottery drawings
• Not systematic
• One bit at a time
• Hit or miss
• Sporadic
• Bit by bit
• By degrees
• Like coin flips
• By chance .
• Patternless
• Haphazard, happening by chance
• Happening by chance, haphazard
• Lacking any definite plan, order or purpose
• Haphazard, no fixed pattern