| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a long period | 391 |
|
| 2 | during a [adj] period | 61 |
|
| 3 | during a long [noun] | 21 |
|
| 4 | during [art] long period | 15 |
|
| 5 | during [art] long period | 15 |
|
| 6 | during a long period | 5 |
|
