| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adv] [adj] period | 267 |
|
| 2 | a [adv] longer [noun] | 99 |
|
| 3 | a [adv] longer [noun sg] | 99 |
|
| 4 | a [adv] long period | 55 |
|
| 5 | a [adv] [adj -er] period | 40 |
|
| 6 | [art] [adv] longer period | 26 |
|
| 7 | a [adv] longer period | 26 |
|
| 8 | [art] [adv] longer period | 26 |
|
| 9 | a [adv] longer period | 25 |
|
