| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adv] [adj] period | 267 |
|
| 2 | a [adv] [adj] for | 101 |
|
| 3 | a [adj] period for | 42 |
|
| 4 | [adv] [adj] period for | 18 |
|
