| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adj] period [prep] | 154 |
|
| 2 | an [adj] period [prep] | 151 |
|
| 3 | [verb] an [adj] [prep] | 69 |
|
| 4 | [verb] an [adj] period | 23 |
|
