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Glossary of watchmaking

Frequency

Fréquence | 周波数/シュウハスウ | 频率

The number of oscillations per second, measured in Hertz. The balance makes a to-and-fro movement at a given frequency (Two vibrations). The higher the frequency, the more accurate the watch: 21,600 vibrations/hour (3 Hz), 28,800 vibrations/hour (4 Hz) and 36,000 vibrations/hour (5 Hz).