| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [prep] a time | 141 |
|
| 2 | [be] [vb pp] [prep] a short | 126 |
|
| 3 | [vb pp] [prep] a short time | 34 |
|
| 4 | [be] [prep] a short time | 5 |
|
