| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] at [det] time [prep] | 11 |
|
| 2 | [been] [vb pp] at [det] time [prep] | 11 |
|
| 3 | [been] [verb] at [det] time in | 7 |
|
| 4 | [been] [verb] at some time [prep] | 5 |
|
