| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period and | 50 |
|
| 2 | [prep] a [adj] and [pron] | 21 |
|
| 3 | [prep] a [adj] period [pron] | 16 |
|
| 4 | a [adj] period and [pron] | 8 |
|
