| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] back to the 19th | 5 |
|
| 2 | back to the 19th [noun sg] | 6 |
|
| 3 | back to the 19th [noun] | 6 |
|
| 4 | back to the 19th century | 5 |
|
| 5 | back to the 19th century | 5 |
|
