| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] [adv] long period | 38 |
|
| 2 | a [adv] long period | 30 |
|
| 3 | [art] very long period | 15 |
|
| 4 | [art] very long period | 15 |
|
| 5 | [art] relatively long period | 7 |
|
| 6 | [art] relatively long period | 7 |
|
| 7 | the [adv] long period | 6 |
|
