| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [be] [verb] at [art] expense | 6 |
|
| 2 | [prep] [be] [vb pp] at [art] expense | 6 |
|
| 3 | [prep] [be] at [art] expense [prep] | 5 |
|
| 4 | [prep] [be] at [art] expense [prep] | 5 |
|
| 5 | [prep] [be] at [art] expense of | 5 |
|
| 6 | [prep] [be] at [art] expense of | 5 |
|
