The phrase "busily preparing" is correct and usable in written English.
You can use it whenever you want to show that someone is spending a lot of effort on something, especially when the effort is necessary for the completion of a task. For example: "John was busily preparing for his upcoming presentation, double-checking every detail to make sure nothing was overlooked."
Businessmen are busily preparing to turn valuable raw materials into comet memorabilia.
On a recent morning, Jeremijenko was at her Greenwich Village apartment, busily preparing a new installation for the East River.
WATERLOO, Belgium — The region around this Belgian city is busily preparing to commemorate the 200th anniversary in 2015 of one of the major battles in European military history.
This is Mr. Flimm's second Ruhr season; he is busily preparing his third, as well as his first season in Salzburg next summer.
Election officials here spent the day busily preparing for what they said would be six consecutive days of 14-hour shifts.
At the intersection of Rice and Valencia, where DuBose was pronounced dead, friends were busily preparing for a rally on a rain-soaked Wednesday evening.
As Reyes sits, McEwing busily prepares for what could be a starting assignment in the opener in Atlanta.
Brightly lit and packed with people, the taquería was comprised of a few tables and an open kitchen, lined with a counter with bar stools behind which chefs busily prepared food for hungry customers.
Meanwhile, police continue to busily prepare for the summits.
As New Bedford's city planners and businesses busily prepare to stage the assembly, construction, and installation of Cape Wind's 2015 "steel-in-the-water" deployment, public acceptance of renewable energy's economic significance has increased.
Also, a "pocket park" was created on the tip of the point of land where construction vehicles are now busily at work, preparing the property for construction.
