| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [noun] [prep] a | 18678 |
|
| 2 | [noun] [prep] a period | 832 |
|
| 3 | [verb] [prep] a period | 506 |
|
| 4 | [verb] [noun] [prep] period | 8 |
|
