| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [modal v] be traced | 205 |
|
| 2 | origin [modal v] be [verb] | 20 |
|
| 3 | origin [modal v] be [vb pp] | 19 |
|
| 4 | origin [modal v] be trace | 5 |
|
| 5 | origin [modal v] [be] traced | 5 |
|
