| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [adj] period | 499 |
|
| 2 | [adv] longer [noun] | 233 |
|
| 3 | [adv] longer [noun sg] | 168 |
|
| 4 | [adv] long period | 68 |
|
| 5 | [adv] [adj -er] period | 44 |
|
| 6 | [adv] longer period | 44 |
|
