| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period [prep] | 1333 |
|
| 2 | [to-vb] a [adj] [prep] | 162 |
|
| 3 | [to-vb] a [adj] period | 35 |
|
| 4 | [to-vb] a period [prep] | 34 |
|
| 5 | [to-vb] [adj] period [prep] | 8 |
|
