| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] than [prep] a | 455 |
|
| 2 | [adv] than once [prep] | 78 |
|
| 3 | [adv] once [prep] a | 40 |
|
| 4 | [adv] than once a | 32 |
|
| 5 | than once [prep] a | 11 |
|
