The phrase "a year and possibly" is correct and usable in written English.
It can be used when discussing a time frame that is uncertain or may extend beyond a specified duration.
Example: "The project will take a year and possibly more, depending on the resources available."
Alternatives: "a year and maybe" or "a year and perhaps".
There are some small studies that show it gives protection for at least a year and possibly longer.
"We estimate that the ongoing cost to the exchequer, in extra benefit spending and lost tax revenue, is at least £20bn a year, and possibly nearer £30bn.
The N.F.L.'s new drug-testing program includes provisions under which all players will be tested for human growth hormone at least once a year, and possibly many more times, the league said Saturday.
Aortic tears may be unfamiliar to most people, but they kill at least 2,000 Americans a year, and possibly more, because some of the deaths may be mistakenly attributed to heart attacks.
Lt. Col. John Whitford, a spokesman for the Connecticut National Guard, said the troops will be in Afghanistan for at least a year and possibly as long as 18 months.
Page C1 Sports HORMONE TESTING IN DOUBT, SAYS N.F.L. PLAYERS UNION Two weeks after the N.F.L. announced that, starting this season, every player would be tested for human growth hormone at least once a year, and possibly much more often, its players union said there may be no H.G.H. testing at all.
New figures from the Mexican government show that the fastest-growing major resort in the world now gets more than 7 million visitors a year and has possibly 1 million permanent inhabitants.
While it had been believed that Sheffield, 35, and the Yankees would agree on a three-year deal, he has been seeking more -- a guarantee that would cover at least a fourth year and possibly a fifth one, too.
Non-reproducing females could return onto the sea ice at freeze-up (November December)7,11 to feed for an additional year and possibly increase their storage energy before re-attempting reproduction.
Speaking at the Denver Museum of Nature and Science on a day when the weather forecast warned of possible tornadoes and golf-ball-size hail east of the city, Dr. Lubchenco said there would be a gap of at least a year and a half, and possibly much longer, during which NOAA has no operational satellite circling the planet on a north-south orbit.
According to various news reports, the Knavses have been living in the United States at least a year and probably much longer — possibly since the mid-2000s.
