It has been more than two years since he has been to a hospital emergency room because of asthma.

VOA: special.2009.07.28

The competition was first held in two thousand two and has taken place every two years since two thousand five.

VOA: special.2009.10.27

Then, almost two years since announcing his candidacy for America's highest office, Mr. Obama began the work of president.

VOA: special.2009.01.24

It has been about forty years since the United States Food and Drug Administration approved a drug especially for treating lupus.

VOA: special.2010.06.15

This September eleventh will be nine years since the al-Qaida terrorist attacks on the United States.

VOA: special.2010.08.05

In the close to forty years since, no one has set foot on the moon.

VOA: special.2010.04.28

The work was first performed in Germany in two thousand to mark two hundred fifty years since the death of the composer Johann Sebastian Bach.

VOA: special.2010.07.19

It has collected population records every ten years since the end of the seventeen hundreds.

VOA: special.2010.06.28

So they remain mostly unchanged in the hundreds of years since they were built.

VOA: special.2009.03.04

Every ten years since seventeen ninety the Constitution has required a population count.

VOA: special.2010.03.20

It has been 3.5 years since the bombing of the mosque triggered one of the worst displacement crises in recent times.

VOA: standard.2009.09.20

It seems hard to believe that it had been 62 years since the Americans had won Olympic gold in the four-man bobsled.

VOA: standard.2010.02.28

It is many years since we started with the United Nations decade for solidarity.

VOA: standard.2009.04.05

In 2009,Russians marked 300 years since their country defeated Sweden in the decisive Battle of Poltava, in which Russia replaced that Scandinavian country as the great power of Northern Europe.

VOA: standard.2009.12.25