| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back [prep] the [adj] century | 139 |
|
| 2 | back [prep] the [adj] century | 139 |
|
| 3 | back [prep] the [num ord] century | 138 |
|
| 4 | back to the [adj] century | 115 |
|
| 5 | back to the [adj] century | 115 |
|
| 6 | back in the [adj] century | 11 |
|
| 7 | back in the [adj] century | 11 |
|
| 8 | back [prep] the eighteenth century | 10 |
|
| 9 | back [prep] the eighteenth century | 10 |
|
| 10 | back [prep] the 13th century | 9 |
|
| 11 | back [prep] the nineteenth century | 9 |
|
| 12 | back [prep] the nineteenth century | 9 |
|
| 13 | back [prep] the 13th century | 9 |
|
| 14 | back [prep] the thirteenth century | 8 |
|
| 15 | back [prep] the 18th century | 8 |
|
| 16 | back [prep] the thirteenth century | 8 |
|
| 17 | back [prep] the sixteenth century | 8 |
|
| 18 | back [prep] the 18th century | 8 |
|
| 19 | back [prep] the sixteenth century | 8 |
|
| 20 | back [prep] the 19th century | 7 |
|
| 21 | back into the [adj] century | 7 |
|
| 22 | back [prep] the 19th century | 7 |
|
| 23 | back into the [adj] century | 7 |
|
| 24 | back [prep] the seventeenth century | 6 |
|
| 25 | back [prep] the twelfth century | 6 |
|
| 26 | back [prep] the last century | 6 |
|
| 27 | back [prep] the 14th century | 6 |
|
| 28 | back [prep] the twelfth century | 6 |
|
| 29 | back [prep] the 14th century | 6 |
|
| 30 | back [prep] the seventeenth century | 6 |
|
