| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [noun sg] over a | 530 |
|
| 2 | [noun sg] over a period | 180 |
|
| 3 | [adj] over a period | 29 |
|
| 4 | [adj] [noun sg] a period | 6 |
|
