| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [prep] a [adj] period [prep] | 124 |
|
| 2 | [vb pp] [prep] a [adj] period [prep] | 116 |
|
| 3 | [vb pp] [prep] a [adj] period of | 87 |
|
| 4 | [vb pp] [prep] a [adj] period of | 87 |
|
| 5 | [vb pp] for a [adj] period [prep] | 48 |
|
| 6 | [vb pp] [prep] a long period [prep] | 32 |
|
| 7 | [vb pp] [prep] a long period [prep] | 28 |
|
| 8 | [vb pp] over a [adj] period [prep] | 27 |
|
| 9 | [vb pp] [prep] a short period [prep] | 15 |
|
| 10 | [vb pp] [prep] a short period [prep] | 13 |
|
| 11 | [vb pp] [prep] a [adj] period in | 12 |
|
| 12 | [vb pp] [prep] a [adj] period in | 12 |
|
| 13 | [vb pp] by a [adj] period [prep] | 10 |
|
| 14 | [vb pp] within a [adj] period [prep] | 9 |
|
| 15 | [vb pp] after a [adj] period [prep] | 7 |
|
| 16 | [vb pp] [prep] a [adj -er] period [prep] | 7 |
|
| 17 | [vb pp] in a [adj] period [prep] | 6 |
|
| 18 | [vb pp] [prep] a [adj] period by | 6 |
|
| 19 | [vb pp] [prep] a [adj] period by | 6 |
|
