| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a longer period [conj] | 7 |
|
| 2 | [noun sg] [prep] a longer period [conj] | 5 |
|
| 3 | [prep] a [adv] longer period [conj] | 5 |
|
| 4 | [prep] a [adv] longer period [conj] | 5 |
|
