| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] in | 1278 |
|
| 2 | [vb mod] occur in | 245 |
|
| 3 | [modal v] occur in | 245 |
|
| 4 | could occur [prep] | 46 |
|
| 5 | could occur [prep] | 46 |
|
| 6 | could occur in | 21 |
|
| 7 | could occur in | 21 |
|
