| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [noun] [prep] a | 57059 |
|
| 2 | [noun] [prep] a period | 832 |
|
| 3 | [adj] [prep] a period | 60 |
|
| 4 | [adj] [noun] [prep] period | 43 |
|
