| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but only for a [adj] period | 5 |
|
| 2 | but [adv] for a [adj] period | 5 |
|
| 3 | but only for a [adj] period | 5 |
|
| 4 | but [adv] for a [adj] period | 5 |
|
