| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] the [det] | 2356 |
|
| 2 | [vb past] the problem | 280 |
|
| 3 | the [det] problem | 202 |
|
| 4 | [vb past] [det] problem | 64 |
|
