The 2,000 miles is the most frequently crossed international border in the world, with about 250 million legal crossing every year.

He crosses frequently, once or twice a month, I should say.

During this service, she frequently crossed battle lines, treating civilians.

Indeed, the lab's projects frequently cross the line between traditional categories like basic and applied research.

That's a real bummer since I cross between both kinds of content frequently.

Pedestrian lines can be anywhere from 30 minutes to 2 hours long, and the wait is unpredictable, those who cross frequently agree.

Driving only during daylight hours is recommended, due to livestock that frequently cross the road at night.

It is the most frequently crossed international border in the world, with approximately 350 million people legally crossing per year.

Pay phones rarely seem to work, lines cross frequently and the system often fails because of little more than a drizzle.

Temperature changes in polar deserts frequently cross the freezing point of water.