| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] the [adj] period a | 23 |
|
| 2 | [prep] the same period a | 14 |
|
| 3 | [prep] the [det] period a | 14 |
|
| 4 | [prep] the same period a | 14 |
|
| 5 | in the [adj] period a | 8 |
|
| 6 | [prep] the [adj] period a | 8 |
|
