我们需要提高安全会议的频率以避免事故。

We need to increase the ___frequency of safety meetings to prevent accidents.

这个无线网络的传输频率是2.4GHz。

The ___frequency of this WiFi signal is 2.4 GHz.

随着会议频率的增加，我们的沟通变得更有效率。

The increasing ___frequency of our meetings has made our communication more efficient.