| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period in [art] | 25 |
|
| 2 | [prep] a [adj] period in [art] | 25 |
|
| 3 | [prep] a [adj] period in the | 21 |
|
| 4 | [prep] a [adj] period in the | 21 |
|
| 5 | for a [adj] period in [art] | 11 |
|
| 6 | for a [adj] period in [art] | 11 |
|
| 7 | [prep] a brief period in [art] | 6 |
|
