| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [vb pp] [prep] a [adj] period | 26 |
|
| 2 | have [vb pp] [prep] a long period | 15 |
|
| 3 | have [vb pp] [prep] a long period | 15 |
|
| 4 | have [vb pp] over a [adj] period | 14 |
|
| 5 | had [vb pp] [prep] a [adj] period | 8 |
|
| 6 | has [vb pp] [prep] a [adj] period | 7 |
|
| 7 | have [vb pp] [prep] a [adj] period | 6 |
|
