| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] at [art] [noun pl] ' expense | 10 |
|
| 2 | [noun pl] at [art] [noun pl] ' expense | 6 |
|
| 3 | [verb] at [art] [noun pl] ' expense | 6 |
|
| 4 | [vb pp] at [art] [noun pl] ' expense | 5 |
|
