| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have a [adj] period [prep] [adj] | 9 |
|
| 2 | have a [adj] period [prep] [adj] | 8 |
|
| 3 | have a [adj] period of [adj] | 8 |
|
| 4 | have a [adj] period [prep] [num] | 6 |
|
