| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adv] [adj] period in | 13 |
|
| 2 | a [adv] [adj] period in | 13 |
|
| 3 | a very [adj] period in | 7 |
|
| 4 | a very [adj] period in | 7 |
|
