| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] [prep] a | 6345 |
|
| 2 | been [vb pp] [prep] a | 5754 |
|
| 3 | be caused [prep] a | 185 |
|
| 4 | [be] caused [prep] a | 185 |
|
| 5 | been caused [prep] [art] | 113 |
|
| 6 | been caused [prep] [art] | 113 |
|
| 7 | been caused [prep] a | 46 |
|
| 8 | [been] caused [prep] a | 37 |
|
| 9 | been caused [prep] a | 37 |
|
| 10 | been cause [prep] a | 37 |
|
