| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] over a [adj] period | 29 |
|
| 2 | [adv] over a [adj] period | 26 |
|
| 3 | [adv] [prep] a long period | 21 |
|
| 4 | [adv] [prep] a long period | 21 |
|
| 5 | [adv] over a long period | 18 |
|
| 6 | [adv] over a long period | 17 |
|
| 7 | [adv] over a long [noun sg] | 16 |
|
| 8 | [adv] over a long [noun] | 16 |
|
| 9 | [adv] over [art] long period | 14 |
|
| 10 | [adv] over [art] long period | 14 |
|
| 11 | [adv] over a long period | 14 |
|
| 12 | [adv] over a long period | 14 |
|
| 13 | [adv] over a long period | 14 |
|
