State intervention is justified only by the chaos that would be caused by a free-for-all over the use of the frequency spectrum.
On top of that, the frequency of major U.S. hurricane strikes over the past several decades is down about one-third compared with the first half of the 20th century.
The overall number of sunspots typically varies in frequency over 11 year cycles.
Nightly television pictures of the tragic destruction from tornadoes over the past months might make one wonder if the frequency of tornadoes is increasing, perhaps due to the increasing levels of CO2 in the atmosphere.
Oddly enough, I find the frequency of the battles a bit over the top.
In four out of the five districts with over 43 CFA core members, floor shininess has increased 63% and frequency of trash pickup has gone, on average, from 1 to 26 times in a day.
The sensors work by detecting extremely low-frequency electrical activity over a distance of 5 microns (one micron being equal to one millionth of a metre).
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Over the past 10 years, the frequency of pipeline spills has decreased by 59%, and the volume of pipeline spills has decreased by 43%, even as overall production has increased both the mileage of active pipelines and the freight tons shipped by them.
Strum down a list of radio stations and you can feel as your fingertip passes over each frequency number.
The SEC is also studying the effects of various trends that have shaped the U.S. stock markets over the course of the last decade, including the proliferation of high frequency trading and of off-exchange trading in so-called dark pools.
The numbers change as we get older, with the overall frequency of all communication declining, but even in the 65 and over group, daily texting still edges calling 4.7 to 3.8.
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Its scientific committee said low-frequency ambient marine noise levels had increased in the northern hemisphere by two orders of magnitude over the last 60 years.
BBC: NEWS | Science/Nature | The deafening sound of the seas
It provides a remarkably flat frequency response over a 10-Hz to 22-kHz bandwidth, a dynamic range of 92 dB, and algorithmic delay of less than 1.89ms.
The closures will not force the shutdown of any of those airports, but pilots will be left to coordinate takeoffs and landings among themselves over a shared radio frequency with no help from ground controllers.
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