| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back into the [num ord] [noun] | 18 |
|
| 2 | back into the [num ord] [noun] | 18 |
|
| 3 | back into the [num ord] [noun sg] | 18 |
|
| 4 | back into the [num ord] century | 7 |
|
| 5 | back into the [num ord] century | 7 |
|
