| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] back to the [adj] [noun sg] | 74 |
|
| 2 | [vb pp] back to the [adj] [noun sg] | 53 |
|
| 3 | [vb pp] back to the [num ord] [noun sg] | 15 |
|
| 4 | traced back to the [adj] [noun sg] | 11 |
|
| 5 | [vb pp] back to the [adj] century | 11 |
|
| 6 | gone back to the [adj] [noun sg] | 6 |
|
| 7 | taken back to the [adj] [noun sg] | 6 |
|
| 8 | brought back to the [adj] [noun sg] | 5 |
|
