| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] a few months | 14 |
|
| 2 | [vb past] [prep] a [det] months | 14 |
|
| 3 | [vb past] [prep] a [det] months | 14 |
|
| 4 | [vb past] for a [det] months | 8 |
|
| 5 | [vb past] for a [det] months | 8 |
|
