| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period [prep] | 773 |
|
| 2 | [verb] [prep] a [adj] period | 425 |
|
| 3 | [verb] [prep] a period [prep] | 418 |
|
| 4 | [verb] [prep] a [adj] [prep] | 340 |
|
| 5 | [verb] a [adj] period [prep] | 180 |
|
| 6 | [verb] [prep] [adj] period [prep] | 84 |
|
