| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] a period [prep] time | 17 |
|
| 2 | [vb past] [adv] a period [prep] time | 7 |
|
| 3 | [adv] [prep] a period [prep] time | 31 |
|
| 4 | [adv] [prep] a period [prep] time | 31 |
|
| 5 | [adv] over a period [prep] time | 22 |
|
| 6 | [adv] over a period [prep] time | 22 |
|
| 7 | [adv] for a period [prep] time | 5 |
|
| 8 | [adv] for a period [prep] time | 5 |
|
| 9 | [adv] a [adj] period [prep] time | 30 |
|
| 10 | [adv] a [adj] period [prep] time | 30 |
|
| 11 | [adv] a long period [prep] time | 11 |
|
| 12 | [adv] a long period [prep] time | 11 |
|
| 13 | [adv] a short period [prep] time | 5 |
|
| 14 | [adv] a short period [prep] time | 5 |
|
