| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period during | 13 |
|
| 2 | [prep] a [adj] period during | 13 |
|
| 3 | [verb] a [adj] period during | 7 |
|
| 4 | for a [adj] period during | 6 |
|
| 5 | for a [adj] period during | 6 |
|
| 6 | a [adj] period during which | 14 |
|
| 7 | a [adj] period during [pron] | 14 |
|
| 8 | a [adj] period during [Wh det] | 14 |
|
| 9 | a [adj] period during which | 14 |
|
| 10 | a [adj] period during the | 7 |
|
| 11 | a [adj] period during [art] | 7 |
|
| 12 | a [adj] period during [art] | 7 |
|
| 13 | a [adj] period during the | 7 |
|
