The phrase "for half a year" is correct and usable in written English.
You could use the phrase to describe a period of time, for example: "I have been living in this city for half a year."
It raised its forecast for half-year profit before tax to between £59m and £61m.
$29,976,000 FOR HALF-YEAR Equal to $2.31 a Share, Against $3.57 in the Corresponding Period of 1929.
After losing dollars 1bn ( pounds 520m) in three years, NatWest's American disaster area has taken a turn for the better in time for half-year results, due early next month.
When their books closed for half-year results at the end of September, four of the 15 full-service insurers Kyoei, Chiyoda, Daihyaku and Tokyo were still nursing unrealised losses on their equity holdings, despite this year's stockmarket rally.It is these weak insurers that are the worry.
On Monday, Tesco admitted that it had overstated its guidance for half-year profits by £250m.
Production was down 1.9 percent year-on-year for the quarter and 2.7 percent for the half year.
The secular variations of the orbital elements are evaluated from the orbital positions propagated for a half year.
The late July deadline can be extended for another half year by mutual consent.
"It has been a bad half year for censorship".
A 45-year old man presented with persistent and progressive watery diarrhea for half a year.
