The phrase 'tested by time' is correct and usable in written English.
You can use the phrase when referring to something that has endured, stood the test of time, or been proven to be reliable over a long period of time. For example, you could say, "The Taj Mahal has been tested by time and remains one of the most iconic tourist destinations in India."
U.S.-made dry-wall containing FGD gypsum has been tested by time, says Gardner: "We have two decades of history that have shown no adverse effects".
By all accounts, including theirs, the relationship is the business equivalent of an old marriage, tested by time and events but very solid.
It is old, which is exactly the point: These tasks have been tested by time and experience, through all manner of social and technological upheavals.
Mario García, mayor of a Zacatecas migrant community called El Cargadero, said most people who go have reliable guides -- their fathers, brothers, and uncles who are part of informal community "social networks" -- and they take routes that have been tested by time.
I would see them periodically in the building's dining room: a couple in a residence populated mainly by widows, always sitting just the two of them, well dressed, slightly formal in speech, given to remarks like, " '60 Minutes' is starting; shall we forgo dessert?" In such a building, everybody has a story — of love won or lost, love tested by time, love sour or sweet.
The Nurses' love, however, is patient and has already been tested by time.
The performance of the PDMS-coated fiber in LDPE membrane bag was tested by time-dependent exposure in a flow-through system at 19°C.
"As our society and systems grow more complex and interdependent, we are going to be tested by times of great crisis," he says.
Findings of this study implied that HDA could penetrate into S. mutans and kill the organism as tested by time-kill kinetic assay.
For the next year, and for several months thereafter, their relationship was tested by distance, time and a dead fish.
Trump's self-styled reputation as a master dealmaker has also been tested by his time in office.
