| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] an [adv] [adj] | 2770 |
|
| 2 | [prep] an [adj] period | 205 |
|
| 3 | an [adv] [adj] period | 28 |
|
| 4 | [prep] [adv] [adj] period | 7 |
|
