The phrase "accumulated over a" is correct and usable in written English.
It can be used when referring to something that has been gathered or collected over a specific period of time.
Example: "The data accumulated over a decade shows significant trends in climate change."
Alternatives: "gathered over a" or "collected over a".
Everything had accumulated over a month.
The debt accumulated over a decade, much of which was marked by drought.
There's a whole suite of reasons, using evidence accumulated over a century of behavioural genetics research.
His technique is a trifle fuzzy, but his musicality, accumulated over a lifetime, endures.
"I wanted to repossess my books," she writes, "to explore what I had accumulated over a lifetime of reading".
It was accumulated over a three-year acquisitions binge, when demand for its $375 shoes and $1,200 chemises seemed insatiable.
"Our pressures and conflicts had accumulated over a long time, but this incident was the fuse," said a Caijing colleague of Mr. Yang, who himself declined to comment.
The first billion people accumulated over a leisurely interval, from the origins of humans hundreds of thousands of years ago to the early 1800s.
That power was accumulated over a period of more than 30 years, during which, as Bower accurately notes, Ecclestone "transformed Formula One from a mere enthusiasts' sport into one of the world's most watched entertainments".
"This suggests to me that the MAD layer accumulated over a considerable period of time — several centuries — perhaps from animals drinking at the mire, rather than in a single event during the passage of Hannibal's army," Wilson wrote.
Including paintings, drawings and sculpture, as well as comic books, the show reveals the mural to be a compendium of ideas accumulated over a lifetime of research into the semiotics of modern art and culture (Johnson).
