| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adv] long period | 55 |
|
| 2 | a [adv] long period | 30 |
|
| 3 | a [adv] longer period | 25 |
|
| 4 | a much long period | 19 |
|
| 5 | a much long period | 19 |
|
| 6 | a very long period | 14 |
|
| 7 | a very long period | 14 |
|
