| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] at a [noun] | 234 |
|
| 2 | be [vb pp] at a [noun sg] | 222 |
|
| 3 | be [vb pp] at a time | 94 |
|
| 4 | [be] [vb pp] at a time | 94 |
|
| 5 | be [vb pp] at [art] time | 85 |
|
| 6 | be [vb pp] at [art] time | 85 |
|
| 7 | be [vb pp] [prep] a time | 37 |
|
| 8 | be [vb pp] [prep] a time | 37 |
|
| 9 | be [vb pp] at a time | 24 |
|
| 10 | be [vb pp] at a time | 24 |
|
| 11 | be [vb pp] at a time | 24 |
|
| 12 | [be] [vb pp] at a time | 24 |
|
| 13 | be [verb] at a time | 24 |
|
