F
Frequency
周波数／シュウハスウ
频率
Frequency
Fréquence
Glossary
Thematic
Regulation, Technic
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).