| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | than once [prep] a [noun] | 10 |
|
| 2 | than once [prep] a [noun sg] | 9 |
|
| 3 | than once [prep] a [noun] | 7 |
|
| 4 | than once in a [noun] | 6 |
|
