| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [adv] been to | 132 |
|
| 2 | had once been [prep] | 10 |
|
| 3 | had once been [prep] | 10 |
|
| 4 | [vb past] once been to | 6 |
|
| 5 | [verb] once been to | 6 |
|
| 6 | have once been to | 6 |
|
| 7 | had once be to | 5 |
|
| 8 | had once been to | 5 |
|
| 9 | had once [be] to | 5 |
|
| 10 | had once [been] to | 5 |
|
