| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for a very long time | 160 |
|
| 2 | [vb past] for a long time | 86 |
|
| 3 | [vb past] a very long time | 16 |
|
| 4 | [vb past] for a very long | 6 |
|
