The phrase "arduous work of" is correct and usable in written English.
It can be used to describe a task or effort that is difficult and requires a lot of effort or endurance.
Example: "The arduous work of preparing for the marathon left her exhausted but proud of her accomplishments."
Alternatives: "challenging task of" or "demanding effort of".
At the time, GUYA was focussed on the arduous work of fighting individual deportation orders.
The arduous work of succession their most important duty was complete.
The whole country must now turn to the arduous work of building a new democratic order to replace the old authoritarian one.
It's easy to do, to take the foot off of the gas for a moment to rest after the arduous work of winning the first two sets.
Finally, they did the arduous work of match-ups so that their readers wouldn't have to, highlighting the extra-fabulous bargains with colored stars.
It took many decades and the arduous work of Baroque opera's advocates to insert the works of the period firmly in the contemporary repertory.
The lesson they should learn from her is that it is very hard to shrink the size of government even when a strong leader has complete control of the legislature, that it takes many years of arduous work to do so and that at the end of the day it won't shrink very much.
The proper functioning of a hospital computer system is an arduous work for managers and staff.
The arduous work to find that killer continues.
Getting to the finish line has taken a decade of arduous work and tens of thousands of pro-bono hours from more than 1,500 experts in psychiatry, psychology, social work, psychiatric nursing, pediatrics, neurology, and other related fields from 39 countries.
When in 1860 sugar was exploited successfully for the first time, indentured labour had to be brought from India to do the arduous work, because Africans many of whom still had their own land and cattle refused to work for the low wages offered on the plantations.
