| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] for a [adj] period | 33 |
|
| 2 | [adj] for [art] long period | 9 |
|
| 3 | [adj] for [art] short period | 6 |
|
| 4 | [adj] for the [adj] period | 5 |
|
| 5 | [adj] for [art] prolonged period | 5 |
|
