| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [adv] | 55870 |
|
| 2 | had [adv] | 38189 |
|
| 3 | [verb] previously | 2048 |
|
| 4 | have previously | 1422 |
|
| 5 | [vb past] previously | 1032 |
|
| 6 | had previously | 903 |
|
