| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adv] a [adj] [noun] | 2020 |
|
| 2 | [prep] [adv] [art] [adj] period | 35 |
|
| 3 | [prep] [adv] [art] [adj] period | 35 |
|
| 4 | [prep] [adv] a [adj] period | 27 |
|
