| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] was once [art] | 19 |
|
| 2 | this was once [art] | 15 |
|
| 3 | [det] was once a | 14 |
|
| 4 | [det] was once a | 12 |
|
| 5 | [det] was once the | 5 |
|
| 6 | [det] was once the | 5 |
|
