| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adj] a [noun] | 6842 |
|
| 2 | [prep] [adj] [art] period | 26 |
|
| 3 | [prep] [adj] [art] period | 26 |
|
| 4 | [prep] [adj] a period | 20 |
|
| 5 | [prep] [adj] a period | 20 |
|
