| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once [verb] [adv prt] to | 23 |
|
| 2 | once [vb pp] [adv prt] to | 14 |
|
| 3 | once [vb past] [adv prt] to | 8 |
|
| 4 | once [adv] [adv prt] to | 5 |
|
