| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] over a long [noun sg] | 20 |
|
| 2 | [adv] over a long period | 18 |
|
| 3 | [adv] over a long period | 18 |
|
| 4 | [adv] over a long [noun] | 16 |
|
