| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] during a [adj] period of | 8 |
|
| 2 | [noun sg] during a [adj] period of | 7 |
|
| 3 | during a [adj] period of [noun sg] | 9 |
|
| 4 | during a [adj] period of [noun] | 9 |
|
