| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] a [adj] period [prep] | 21 |
|
| 2 | [vb pp] a [adj] period [prep] | 19 |
|
| 3 | [vb pp] a long period [prep] | 9 |
|
| 4 | [vb pp] a long period [prep] | 7 |
|
| 5 | [verb] [vb pp] a period [prep] | 24 |
|
| 6 | have [vb pp] a period [prep] | 23 |
|
| 7 | [adv] [vb pp] a period [prep] | 13 |
|
| 8 | [adv] [vb pp] a period [prep] | 10 |
|
| 9 | [vb past] [vb pp] a period [prep] | 9 |
|
| 10 | had [vb pp] a period [prep] | 8 |
|
| 11 | [vb -s] [vb pp] a period [prep] | 8 |
|
| 12 | has [vb pp] a period [prep] | 8 |
|
| 13 | [vb pp] [prep] a period [prep] | 232 |
|
| 14 | [vb pp] [prep] a period [prep] | 232 |
|
| 15 | [vb pp] over a period [prep] | 71 |
|
| 16 | [vb pp] over a period [prep] | 71 |
|
| 17 | [vb pp] for a period [prep] | 45 |
|
| 18 | [vb pp] for a period [prep] | 45 |
|
| 19 | [vb pp] by a period [prep] | 33 |
|
| 20 | [vb pp] by a period [prep] | 33 |
|
| 21 | [vb pp] within a period [prep] | 17 |
|
| 22 | [vb pp] within a period [prep] | 17 |
|
| 23 | [vb pp] as a period [prep] | 16 |
|
| 24 | [vb pp] as a period [prep] | 16 |
|
| 25 | [vb pp] [verb] a period [prep] | 9 |
|
| 26 | [vb pp] in a period [prep] | 9 |
|
| 27 | [vb pp] [to-vb] a period [prep] | 9 |
|
| 28 | [vb pp] in a period [prep] | 9 |
|
| 29 | [vb pp] through a period [prep] | 8 |
|
| 30 | [vb pp] to a period [prep] | 8 |
|
