| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [prep] a time | 37 |
|
| 2 | [vb pp] [indef pn] [prep] a time | 22 |
|
| 3 | [be] [vb pp] [indef pn] [prep] a | 13 |
|
