| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] traced back [prep] the [noun] | 24 |
|
| 2 | be traced back [prep] the [noun] | 24 |
|
| 3 | [be] traced back to the [noun] | 22 |
|
| 4 | [be] traced back to the [noun] | 22 |
|
| 5 | [be] traced back [prep] the [noun sg] | 14 |
|
| 6 | [be] traced back [prep] the [noun pl] | 8 |
|
