| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for the [num ord] half [prep] 1991 | 11 |
|
| 2 | for [art] [num ord] half [prep] 1991 | 11 |
|
| 3 | for [art] [num ord] half [prep] 1991 | 11 |
|
| 4 | for the [num ord] half [prep] 1991 | 11 |
|
| 5 | for [art] [num ord] half of 1991 | 11 |
|
| 6 | for [art] first half [prep] 1991 | 9 |
|
