| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but once [art] | 96 |
|
| 2 | but once [art] | 96 |
|
| 3 | but once the | 78 |
|
| 4 | but once the | 78 |
|
| 5 | but once a | 18 |
|
| 6 | but once a | 17 |
|
