| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [prep] a long | 197 |
|
| 2 | [be] [vb pp] [prep] a period | 166 |
|
| 3 | [vb pp] [prep] a long period | 67 |
|
| 4 | [be] [vb pp] [prep] long period | 39 |
|
