| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] over a long period | 22 |
|
| 2 | [adv] over a long period | 22 |
|
| 3 | [adv] over [art] long period | 22 |
|
| 4 | [adv] over [art] long period | 18 |
|
| 5 | [adv] over [art] long period | 17 |
|
| 6 | [adv prt] over [art] long period | 5 |
|
