| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a [adj] | 110294 |
|
| 2 | [prep] a [adj] period | 1646 |
|
| 3 | [noun] [prep] a period | 832 |
|
| 4 | [noun] [prep] [adj] period | 28 |
|
| 5 | [noun] a [adj] period | 11 |
|
