| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] a [adj] period of | 135 |
|
| 2 | [verb] [verb] a [adj] of | 72 |
|
| 3 | [verb] [verb] a period of | 35 |
|
| 4 | [verb] [verb] a [adj] period | 25 |
|
| 5 | [verb] [verb] [adj] period of | 12 |
|
