"generous concession" is correct and usable in written English.
This phrase typically refers to an act of kindness or generosity done with respect to a request or demand. For example: "The teacher made a generous concession and allowed the student to take the exam later than normal."
7.25pm: Lee Westwood is just one down again after a surprisingly generous concession from Kenny Perry.
Three years later he granted the company a generous concession to construct a railway between Puerto Barrios and Guatemala City.
"If I didn't understand what was going on, I would think that an 11% pay rise was a very generous concession.
George Osborne's announcement that he is going to freeze fuel duty until 2015 was presented as a generous concession, but in reality it was an admission that raising fuel duty is now just too unpopular to be politically acceptable.
The reference to ideas was, in rhetorical terms, a generous concession, considering that the majority party has adopted idealessness as its guiding gun-control policy, as when helplessly lamenting the futility of gun laws, in the style of Florida's Senator Marco Rubio.
As my last campaign effort, I made hundreds of buttons that said: HILLARY SUPPORTS OBAMA SO DO I. Then I got on the plane to Washington, went to join the crowd at her historic and generous concession speech – in which she pledged her wholehearted support to Obama – and distributed the buttons to the audience.
Effective rents have fallen by even more, because landlords are offering generous concessions.
The new government met the strikes with generous concessions on wages and pensions.
Tax concessions aren't free – government effectively spends money to maintain these generous concessions.
No doubt in return for generous concessions, he was made honorary president for life of the Association of Greek Shipowners.
The EPA will also require the Caribbean to extend to Europe any more generous concessions that it makes in future to countries such as Brazil or China.
