| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [det] months | 401 |
|
| 2 | [vb past] [prep] a [det] | 300 |
|
| 3 | [vb past] a [det] months | 37 |
|
| 4 | [vb past] [prep] [det] months | 19 |
|
