The World Health Organization also advised a three-year interval between each child.
Experts partly attribute the drop-off in generals entering politics in recent years to a 2007 law requiring a three-year interval for senior officers between taking off their uniforms and running for Parliament.
For those who decide to get tested, the American Urological Association also recommends a two-year interval between tests, as opposed to the previous one-year interval.
This happened in 365, after a turbulent five-year interval of two brief reigns, those of Alexander II and Ptolemy, and one intervention by a pretender, Pausanias.
He says finding just one or two big events in a thousand-year interval improves scientists' understanding of flood probabilities as much as several centuries of gage measurements.
I only feel comfortable taking on a problem when I feel meaningful results can come over a three- to five-year interval.
The current method of measuring contraceptive discontinuation (quitting, switching and method failure) relies on household surveys collected in five-year intervals through a retrospective monthly contraceptive calendar.
Like a comet, The Roots orbit Planet 'Roo in nearly five-year intervals, from the festival's second year ('03), through its middle ('07) and, if the cosmic doomsayers are correct about 2012, its end.
Handfield said he would be surprised to see even a quarter of that figure spent in the next five-year interval, ending in 2017.
Something else to consider: The treaty states that "five years after entry into force of this treaty, and at five-year intervals thereafter, the parties shall together conduct a review of this treaty". Next year , 2002 is one of those five-year intervals.
He said that if analysts added a single year, 2014, and looked at four-year intervals instead of five-year intervals, the average number of annual mass shootings actually declined slightly from 2011 to 2014, compared with the previous four-year period.
