| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] a long period [prep] | 8 |
|
| 2 | [adv] [prep] a long period [prep] | 16 |
|
| 3 | [adv] [prep] a long period [prep] | 16 |
|
| 4 | [adv] over a long period [prep] | 9 |
|
| 5 | [adv] over a long period [prep] | 9 |
|
| 6 | [adv] [verb] a long period [prep] | 5 |
|
| 7 | [adv] a long period [prep] [noun] | 12 |
|
| 8 | [adv] a long period [prep] [noun sg] | 12 |
|
| 9 | [adv] a long period [prep] time | 11 |
|
| 10 | [adv] a long period [prep] time | 11 |
|
