| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] a [adj] period [prep] | 184 |
|
| 2 | [verb] [prep] a [adj] period of | 137 |
|
| 3 | [vb pp] [prep] a [adj] period [prep] | 124 |
|
| 4 | [verb] for a [adj] period [prep] | 80 |
|
| 5 | [verb] [prep] a long period [prep] | 42 |
|
| 6 | [verb] [prep] a long period [prep] | 38 |
|
| 7 | [verb] over a [adj] period [prep] | 28 |
|
| 8 | [verb] [prep] a short period [prep] | 27 |
|
| 9 | [verb] [prep] a short period [prep] | 25 |
|
| 10 | [verb] [prep] a [adj] period in | 18 |
|
| 11 | [vb past] [prep] a [adj] period [prep] | 17 |
|
| 12 | [verb] after a [adj] period [prep] | 13 |
|
| 13 | [vb infin] [prep] a [adj] period [prep] | 13 |
|
| 14 | [v-ing] [prep] a [adj] period [prep] | 13 |
|
| 15 | [to-vb] [prep] a [adj] period [prep] | 11 |
|
| 16 | go [prep] a [adj] period [prep] | 11 |
|
| 17 | [verb] through a [adj] period [prep] | 11 |
|
| 18 | [verb] by a [adj] period [prep] | 11 |
|
| 19 | [vb -s] [prep] a [adj] period [prep] | 10 |
|
| 20 | [verb] within a [adj] period [prep] | 9 |
|
| 21 | [verb] in a [adj] period [prep] | 9 |
|
| 22 | [verb] [prep] a [adj -er] period [prep] | 8 |
|
| 23 | [verb] from a [adj] period [prep] | 7 |
|
| 24 | [verb] [prep] a [adj] period by | 6 |
|
| 25 | [verb] [prep] a fixed period [prep] | 6 |
|
| 26 | [verb] [prep] a fixed period [prep] | 6 |
|
| 27 | [verb] [prep] a brief period [prep] | 5 |
|
| 28 | [verb] [prep] a considerable period [prep] | 5 |
|
| 29 | [vb base] [prep] a [adj] period [prep] | 5 |
|
| 30 | [verb] [prep] a limited period [prep] | 5 |
|
