1.0 milliseconds -- cycle time for frequency 1 kHz
1 ms -- duration of light for typical photo flash strobe
2.27 ms -- cycle time for the A above middle C in music (440 Hz). If an electric tuning device for musical instruments generates just one tone, this is probably that tone.
... residing in the town. The population density is 139.0/km² (360.6/mi²). There are 744 housing units at an average density of 136.8/km² (354.8/mi²). ...