The phrase "have proven time" is not grammatically correct in written English.
A more grammatically correct phrase might be "have proven over time" or "have been proven over time". For example, you could say: "These techniques have been proven over time to be effective."
Las Vegas, Reno, and other major jurisdictions have proven time and again how strong gaming can be for a particular region.
Rightwing governments may excuse their response, say it's sufficient, but they have proven time and again that they are incompetent to govern.
Moreover, the most ambitious clubs have proven time and again that when top players are available, you have to sign them and worry how they fit in afterwards.
However, complete and detailed foot models based on medical image segmentation have proven time consuming to build and computationally expensive to solve, hindering their utility in practice.
State and national governments, especially those run by Coalition governments, have proven time and again that despite occasional displays of largesse they are largely hopeless when it comes to consistent and continuing support for the arts.
On Friday, Ms. McCarthy said: "We have proven time after time that setting fair Clean Air Act standards to protect public health does not cause the sky to fall.
Simple dose-ranging comparisons have proven time-consuming and low-throughput.
But the players have proved time and time again they can now rise to the challenge".
"Certainly, Sheldon and his team have proved time and time again that they produce great projects".
But Cameron and his colleagues have proved time and time again that they stand up for the wrong people.
The courts have proved time and again that truth must be titrated.
