The phrase "previously unprecedented" is correct and commonly used in written English.
It means "never before seen or experienced". Example: The company's success in the market was previously unprecedented, with a 200% increase in profits compared to last year.
Along with the Assassin's Creed (see No 35), Warcraft could be the start of a movement previously unprecedented: game-based films that don't embarrass fans of both.
City, which is pushing the boundaries of player purchases and salaries even beyond the previously unprecedented spending of Roman Abramovich at Chelsea.
He safeguarded the pavilion's future prospects by overseeing the negotiations for matching revenue funding of more than £1m annually from Rother district council and Arts Council England – a previously unprecedented arrangement at this high level of funding.
But the toll of the crisis overwhelming the island this year has seen the bodies of men, women and children come in at a previously unprecedented rate, filling the consecrated ground.
That the 36-year-old Scot should simultaneously provide Britain's eighth cycling gold from London, drawing equal to the previously unprecedented all-time maximum of eight clinched in Beijing, made his final triumph - on home soil to boot - even more appropriate.
(There were three million more votes for the Democratic candidate for President and approximately six million more votes for Democrats in Senate races — yes, it was designed to be unjust, but that does not make it less unjust — and this was, of course, the second time in five elections that the Presidential candidate who won the most votes was denied the office, a previously unprecedented thing).
She noted Trump previously garnered an unprecedented amount of national media coverage in November for simply making a radio ad buy. .
A protein localisation screen of yeast GFP strains previously identified an unprecedented number of proteins exhibiting cytoplasmic redistribution into punctae during nutrient restriction (Narayanaswamy et al., 2009).
David J. Adelman, a tobacco analyst for Morgan Stanley, said the Florida case and, separately, forthcoming class-action lawsuits over light cigarette claims pose an "undeniable" increase in the industry's legal risk "which had previously declined to an unprecedented low point".
The Archbishop, who has said previously Isis pose an unprecedented threat to Christians in the Middle East, called the group the "Herod of today" in reference to the murderous Biblical king.
For app developers, this brings unprecedented and previously unreachable scale to building technology for businesses.
