Roughly, time it takes for light to travel one ft

• Minuscule part of a 34-Do
• Minuscule part of a 34-Down: Abbr.
• One of 60 billion in a min
• Extremely short time (abbr.)
• Short period of time, for short
• Fraction of a min
• Time for light to travel about one ft
• Tiny time unit, for short
• Tiny bit of time: Abbr.

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