| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adv] longer period | 21 |
|
| 2 | [prep] a [adv] longer period | 21 |
|
| 3 | over a [adv] longer period | 11 |
|
| 4 | over a [adv] longer period | 11 |
|
| 5 | for a [adv] longer period | 8 |
|
| 6 | for a [adv] longer period | 8 |
|
| 7 | a [adv] longer period [prep] | 5 |
|
| 8 | a [adv] longer period [conj] | 5 |
|
| 9 | a [adv] longer period of | 5 |
|
| 10 | a [adv] longer period of | 5 |
|
| 11 | a [adv] longer period [prep] | 5 |
|
