The phrase "assumed during" is correct and usable in written English.
It can be used when referring to something that was taken for granted or accepted as true within a specific timeframe or context.
Example: "The results of the experiment were based on conditions that were assumed during the initial phase of the study."
Alternatives: "presumed at the time" or "taken for granted during".
The name Filarete, probably assumed during his Milanese period, was derived from the Greek meaning "lover of virtue".
It must be assumed during that period between round 12 and round 23, Arden Street was a hive of protracted negotiations.
Barring a disastrous revelation or blunder, Mitt Romney will be a more formidable opponent than many assumed during his rightward lurch to secure the Republican nomination.
The nation, and in particular the Tutsi minority, has yet to uncurl from the defensive crouch that was understandably assumed during the genocide.
The Goodrich Corporation said yesterday that it would spin off its engineered products unit in a deal that executives expect will strengthen its aerospace business and relieve the firm of asbestos-liability costs assumed during a 1999 acquisition.
There are fragments of a Torah from L'Isle-sur-la-Sorgue, burnt, it is assumed, during the Revolution and discovered hidden in the roof of Cavaillon's synagogue, when it was restored early in this century.
Noel Adrian Doorbalal, played by Anthony Mackie, was his meek best friend and partner in crime, literally the Robin to Lugo's Batman – codenames that the two assumed during Schiller's captivity and torture.
Over the last several months Mr. Koons, who has always been a polarizing artist, has been at work in a role he has never assumed during his three-decade career, that of curator of other people's art.
When I went in, he was sitting in the same quiet pose he always assumed during "personal time" in the Oval Office: glossy head tilted forward, jacket sleeves half on his desk, white cuffs protruding exactly one inch, his black Parker lying ready on its own polished leather reflection.
Yet even after his death in 1969 -- and for all the years the American troops fought in Vietnam -- he remained a shadowy figure, his life and career shrouded in myth and in the myriad guises he assumed during his many years in exile and in the maquis of Vietnam.
Adored for his success as a lyricist and vocalist as well as for his work for human rights and developing impoverished cultures, Bono is less remembered for his experimentation with alter egos, which he assumed during the band's early '90s Zoo TV Tour.
