Fatal road accidents have decreased in frequency over recent years.

近年来致命交通事故发生率已经下降。

《牛津词典》

Those are high in frequency.

有很高的频率。

youdao

For a minute, it rose rapidly in frequency; then it disappeared.

它的频率一会儿会迅速升高，然后就消失了。

youdao

The strikes have increased in frequency in recent months.

VOA: standard.2009.05.12

So, let's say they were expecting to see one certain frequency or one line in the spectrum at this point here.

比如说他们预计会看到某个特定的频率,或者在这里看到一个谱线。

麻省理工公开课 - 化学原理课程节选

So, if something cycles through five wavelengths in a single second, we would just say that the frequency of that wave is five per second.

如果一个东西在一秒,内经历了五个波长，我们就说这个波的,频率是每秒5次。

麻省理工公开课 - 化学原理课程节选

The inquiry heard that the increase in frequency meant there was an increase in risk.

BBC: Murdered RUC men Breen and Buchanan warned about risk

But 84 percent thought stress testing should be increased in frequency to at least every six months.

FORBES: Finance Execs Don't Trust Stress Testing But Want More of It

Alexander noted that cyberattacks have been increasing in frequency for some time now.

CENTERFORSECURITYPOLICY: Center for Security Policy | Ramping Up on Cyberwarfare Could Mean Reexamining Rules of War