| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how he had [adv] | 23 |
|
| 2 | [adv] he had once | 11 |
|
| 3 | how [pron] had once | 11 |
|
| 4 | how he [verb] once | 8 |
|
| 5 | how he have once | 8 |
|
| 6 | how he [vb past] once | 8 |
|
| 7 | [Wh adv] he had once | 8 |
|
| 8 | how he had once | 7 |
|
