| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period [prep] | 1182 |
|
| 2 | a [adj] period and | 58 |
|
| 3 | a [adj] and [prep] | 35 |
|
| 4 | [adj] period and [prep] | 34 |
|
