| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] [verb] [prep] | 7290 |
|
| 2 | could [be] [vb pp] [prep] | 7114 |
|
| 3 | [vb mod] [be] attributed [prep] | 224 |
|
| 4 | [modal v] [be] attributed [prep] | 224 |
|
| 5 | could [be] attribute [prep] | 32 |
|
| 6 | could [be] attributed [prep] | 32 |
|
