| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] once [prep] a [noun sg] | 30 |
|
| 2 | than [adv] [prep] a [noun sg] | 30 |
|
| 3 | than once [prep] [art] [noun sg] | 21 |
|
| 4 | than once [prep] a [noun] | 10 |
|
| 5 | than once [prep] a [noun sg] | 9 |
|
