The phrase "an important division of" is correct and usable in written English.
It can be used when discussing categories or segments within a larger context, such as fields of study, organizations, or classifications.
Example: "Biology is an important division of the natural sciences, encompassing various sub-disciplines like botany and zoology."
Alternatives: "a significant branch of" or "a key sector of".
The newsboys constitute an important division of this army of homeless children.
Hollywood and independent filmmaking have engaged in an important division of labor: Hollywood specializes in making money, the independents specialize in making movies.
Malakand Division is an important division of Khyber Pukhtoonkhwa which includes the districts Swat, Buner, Shangla, lower Dir, upper Dir, Chitral and Malakand.
In that sense, the notion of automobiles for the masses was once a distant object until Henry Ford applied the all important division of labor to car manufacturing.
An important division among versions of reasons internalism is between what we will here call Motivation views and State views.
Just a few weeks ago, the only important division of opinion on Chen seemed between the Chinese authorities (who thought he could do no right) and nearly everyone else (who thought he could do no wrong).
A senior Army officer said the Crusader would remain an important part of a division's firepower in combat until General Shinseki's "objective force" becomes a reality.
And then there's a fourth business that people don't actually have a lot of visibility to, but which is an important part of the division, which is our mice and keyboard business and our embedded software business.
The most important division of the land in Saskatchewan is between the northern one-third of the province, which is part of the Canadian Shield, and the plains, which cover the southern two-thirds.
In 1329, by the Treaty of Pavia, Louis IV made the first important division of the Wittelsbach lands by granting the Palatinate of the Rhine and the upper Palatinate of Bavaria to his brother's sons, Rudolf II (d. 1353) and Rupert I. Rupert, who from 1353 to 1390 was sole ruler, was granted the title of elector of the Palatinate of the Rhine in 1356.
In 1329, by the Treaty of Pavia, Louis IV made the first important division of the Wittelsbach lands by granting the Palatinate of the Rhine and the Upper Palatinate of Bavaria to his brother's sons, Rudolf II (died 1353) and Rupert I. Rupert, who from 1353 to 1390 was sole ruler, was granted the title of elector of the Palatinate of the Rhine in 1356.
