'prominent instance' is correct and usable in written English.
You can use it when you want to convey the idea of something that is an example of something particularly noteworthy or memorable. For example, "The September 11th attacks are a prominent instance of terrorism in the 21st century."
Americans will likely remember the most prominent instance of violence by self-radicalized individuals as a shooting of nine black churchgoers in Charleston, South Carolina by Dylann Roof in June 2015.
The case is the latest chapter of the legal assault on Obamacare, but it is also the most prominent instance of a larger fight over an ascendant legal theory known as textualism.
In the most prominent instance, Viktor F. Vekselberg, an oil and aluminum magnate, returned the Forbes family collection of Fabergé Imperial Easter eggs to Russia in 2004, at a cost of $100 million.
For this purpose, the study draws on a prominent instance of 3D/games software culture where interdependencies can be seen to develop between institutions, users, and ICTs directing our attention to the exploration of 'ownership', thereby highlighting the boundaries of participation and competition.
A prominent instance of undetected malware in routing hardware occurred in the case of VPNFilter.
The most prominent instance of this strategy is his embrace of an atomist matter theory as a 'most likely hypothesis'.
Still, Beijing generally has been loath to expel foreign journalists, and the few prominent instances have often involved allegations that reporters had violated national security prohibitions.
One of the most prominent instances involved Tiger Woods, whose illegal drop at the Masters was spotted by a former rules official watching the tournament on television.
I work closely with the LGBT community in America, including at Princetonâs LGBT Center, but until Thailand, I had never seen such open and prominent instances of Asian gender fluidity before, especially not in my native China.
There are two especially prominent instances of this.
The most prominent instances of this can be found in international institutions.
