The phrase "a week and perhaps" is correct and usable in written English.
It can be used when indicating a time frame that is uncertain or flexible, suggesting that something may take about a week, but there is a possibility it could take longer or shorter.
Example: "The project will take a week and perhaps a few days more, depending on the team's availability."
Alternatives: "about a week and maybe" or "roughly a week and possibly".
The deputies meet together with Mr. Dinkins a few mornings a week and perhaps on the weekend.
The league would probably need at least a week, and perhaps two, after an agreement in principle is reached to have it entirely completed and approved.
Even so, he added, the entire process — including the backup lab analysis — might be shortened to less than a week and perhaps as little as three or four days.
Assuming that the sex workers don't work seven days a week and perhaps only half are working at any one time, it could still add up to about €10bn a year.
The monks threatened this autumn to close the monastery to visitors for a week, and perhaps permanently, unless development at the top end of the cable-car system, next to the monastery, was restricted.
For Windsor to visit A&E or the police lock-up three times a week, the good citizens of Ottawa were paying at the very least $1,000£55050) a week and perhaps double or triple that.
Anthony joined the Tour briefly in 1963 without winning, then returned to his grocery job, bowling three nights a week and earning perhaps $8,000 annually in local prize money.
"It's been a tough week and perhaps that's showed.
The column should appear regularly in a fixed spot, ideally every other week and perhaps on Page 2 of the Week in Review or alternating with the Public Editor in his space.
However, he looks a little drained this week and perhaps the last few pounds have proved more difficult than he imagined.
Mr. Segarra said the restaurant keeps several of the cuy defrosted and marinated during the week, and perhaps a dozen on hand for the weekend.
