| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adj] [noun] [prep] a | 8115 |
|
| 2 | [adj] [noun] [prep] a period | 179 |
|
| 3 | [prep] [noun] [prep] a period | 155 |
|
| 4 | [prep] [adj] [noun] [prep] period | 7 |
|
| 5 | [prep] [adj] [prep] a period | 5 |
|
