Some people experience this kind of pain as often as two weeks every month.

VOA: special.2010.03.30

Experts say the disease affects women at least two times as often as men.

VOA: special.2009.01.06

But he could not fly as often as he liked.

VOA: special.2009.03.18

A "tornado outbreak" is often defined as six or more tornadoes produced by the same weather system within a day.

VOA: special.2010.05.11

Rockman often shows nature as defined by a struggle for survival with a never-ending repetition of life and death.

VOA: special.2010.12.15

Pirate ships often flew the flag of a friendly country as they sailed toward the ship they planned to rob.

VOA: special.2009.05.24

Now,we probably most often think of doughboys as the soldiers who fought for the Allies in World War One.

VOA: special.2010.03.07

Mr.Hawass is often described as a colorful leader who has brought Egypt's long-ago past to the attention of the world.

VOA: special.2011.03.08

Audrey Hepburn often said her loyalty to UNICEF was the result of her experiences as a child during World War Two.

VOA: special.2009.10.16

Right now,as schools prepare to begin a new year, one concern is the H1N1 virus, often called swine flu.

VOA: special.2009.08.13

It is a way for people to establish their identities in often unfriendly areas as they struggle to hold their communities together.

VOA: special.2009.02.22

They can develop as flat, discolored areas of skin or as raised growths, often with a rough surface.

VOA: special.2010.07.06

The road is narrow and the traffic is often slow as it travels through each of the small towns of the Keys.

VOA: special.2010.03.22

Researchers say babies who are breastfed often grow up to have lower blood pressure and cholesterol as adults.

VOA: special.2010.08.04