They calculate that within four years this method could even replace insecticide-treated bed nets as a way of controlling mosquitoes.

BBC: NEWS | Health | Fungi 'new tool' against malaria

Within four years, however, this little-known brigadier had driven an invading Greek army back into the Aegean and persuaded the great powers to recognise the new republic.

ECONOMIST: Turkish history (1)

Within four years of the composition of this essay, Mr. Hamilton had an opportunity to reflect on his own words.

CNN: Sen. Gorton's closed-door impeachment statement

So even a selective hiring freeze, not a total hiring, but a selective hiring freeze would shrink this bureaucracy down to a manageable size within four years.

CENTERFORSECURITYPOLICY: Center For Security Policy

Last month, announcing its Adoption Action Plan, it brought in an interim target of 21 months and said this would be lowered to 14 months within four years.

BBC: Adoption: New scorecards attacked by council leaders

Now we've still got a long way to go and within four years I want to have more police employed in this country than ever before and we've got the money to do it, but you will find, I think, in the next ten days the first evidence that we are in fact getting there, that we are recruiting extra numbers.

BBC: NEWS | Programmes | Breakfast with Frost | Economy is key battleground

You've probably never heard of Hefei, but if the leaders of this city of nearly four million people have their way, within a few years you'll know all about it.

NPR: China Seeks Cheaper Labor Within Its Borders

Within a year, with some demonstrated progress, the company asked him to shorten the time horizon to accomplish this in four years rather than five.

FORBES: There's A Smarter Way To Tighten An IT Budget