| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] a [adj] period of | 150 |
|
| 2 | have [verb] a [adj] of | 42 |
|
| 3 | have [verb] a period of | 21 |
|
| 4 | have a [adj] period of | 18 |
|
| 5 | have [verb] a [adj] period | 16 |
|
| 6 | have [verb] [adj] period of | 7 |
|
