The phrase "busy line" is correct and can be used in written English.
It refers to a phone line that is currently in use or unavailable for a call. You can use it in situations such as: 1. "I tried calling the office but I kept getting a busy line." 2. "Please call back later, the line is busy at the moment." 3. "She was unable to reach him as the phone line was constantly busy." 4. "The restaurant's phone lines were busy all night due to the high volume of reservations."
Mr. Fleuranges said that adding even one train on a busy line like the No. 3 would shave about a minute off wait times and would relieve crowding.
Although the station is located on a busy line which passes through Darlington and Middlesbrough, just two trains stop at the station each week, both on a Sunday.
In other words, if a train or bus on a busy line is supposed to arrive every three minutes, then it is held to a stricter standard than a train or bus on a less busy line that is supposed to arrive every seven minutes.
Mr Singh has placed comical props around his office: a black Trilby and dark glasses, Sherlock Holmes paraphernalia, an oversized magnifying glass.Business is buoyant, he says, in part because of a busy line in "marital investigations".
The Piccadilly upgrade is due to deliver faster and more frequent trains on the route by 2014 and failure to deliver it on time raises the threat of overcrowding on an already busy line.
"I am looking at my phones, and there is only one busy line," said Stephen L. Weir, the clerk-recorder in Contra Costa County here east of San Francisco, where an election officer training course today managed only half of the expected turnout.
If the iPad Pro and Mini are part of the event, they will join what looks to be a busy line-up.
Could it be that the Northampton/Leicester/Bath era of dominance in the England starting XV is about to morph into a Saracens/Wasps/Exeter style: big but, crucially, mobile forwards, rugby-smart half-backs, busy line-breaking outside backs and swarming defence?
With a go-ahead from superiors, Armscor, South Africa's arms procurement agency, was busy lining up the needed documentation.
Try not to be afraid of calling universities – and don't be put off by the busy lines either.
Rieckhoff was called for another photo op — this time with columnist Les Gelb, who was busy lining up the participants in front of I.A.V.A.'s backdrop.
