| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and [prep] a [adj] | 2281 |
|
| 2 | [prep] a [adj] period | 1646 |
|
| 3 | and [prep] a period | 38 |
|
| 4 | and a [adj] period | 16 |
|
