| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] by [noun] | 802 |
|
| 2 | [to-vb] by [noun sg] | 521 |
|
| 3 | [to-vb] [prep] trial | 33 |
|
| 4 | [verb] by trial | 32 |
|
| 5 | [to-vb] by trial | 5 |
|
