| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [det] a [adj] | 2326 |
|
| 2 | [prep] a [adj] period | 1796 |
|
| 3 | [prep] [det] [adj] period | 311 |
|
| 4 | [det] a [adj] period | 33 |
|
| 5 | [prep] [det] a period | 19 |
|
