| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [adj] periods [prep] | 13 |
|
| 2 | have [adj] period [prep] | 8 |
|
| 3 | have [adj] period of | 8 |
|
| 4 | had [adj] period [prep] | 7 |
|
| 5 | have long period [prep] | 7 |
|
