| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] a [adj] period of | 129 |
|
| 2 | [vb pp] [prep] a [adj] period of | 80 |
|
| 3 | [verb] for a [adj] period of | 44 |
|
| 4 | [verb] [prep] a long period of | 31 |
|
| 5 | [verb] over a [adj] period of | 22 |
|
| 6 | [verb] [prep] a short period of | 16 |
|
| 7 | [vb past] [prep] a [adj] period of | 13 |
|
| 8 | [verb] after a [adj] period of | 11 |
|
| 9 | [vb infin] [prep] a [adj] period of | 10 |
|
| 10 | [verb] in a [adj] period of | 9 |
|
| 11 | [to-vb] [prep] a [adj] period of | 9 |
|
| 12 | [v-ing] [prep] a [adj] period of | 7 |
|
| 13 | [verb] by a [adj] period of | 6 |
|
| 14 | [verb] through a [adj] period of | 6 |
|
| 15 | [verb] [prep] a fixed period of | 6 |
|
| 16 | [verb] within a [adj] period of | 6 |
|
| 17 | [vb -s] [prep] a [adj] period of | 6 |
|
| 18 | [verb] from a [adj] period of | 6 |
|
| 19 | [verb] [prep] a given period of | 5 |
|
| 20 | [verb] to a [adj] period of | 5 |
|
| 21 | go [prep] a [adj] period of | 5 |
|
| 22 | last [prep] a [adj] period of | 5 |
|
