| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a long period [prep] | 245 |
|
| 2 | [vb pp] a period [prep] | 42 |
|
| 3 | [vb pp] a long period | 9 |
|
| 4 | [vb pp] long period [prep] | 6 |
|
