| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] a [adj] period | 247 |
|
| 2 | [verb] a [adj] in | 141 |
|
| 3 | a [adj] period in | 112 |
|
| 4 | [verb] a period in | 20 |
|
| 5 | [verb] [adj] period in | 6 |
|
