| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [prep] a [adv] long period | 6 |
|
| 2 | [conj] [prep] a [adv] long period | 6 |
|
| 3 | [conj] [prep] a long period [prep] | 5 |
|
| 4 | [conj] [prep] a long period [prep] | 5 |
|
