| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adv] longer period | 25 |
|
| 2 | a longer period [conj] | 19 |
|
| 3 | a [adv] longer [conj] | 5 |
|
| 4 | [adv] longer period [conj] | 5 |
|
