| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] a past history | 5 |
|
| 2 | [verb] a past history | 5 |
|
| 3 | [verb] a past history | 5 |
|
| 4 | had a past history | 5 |
|
| 5 | have a past history | 5 |
|
