| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] back [prep] the [num ord] century | 112 |
|
| 2 | [verb] back to the [adj] century | 106 |
|
| 3 | date back [prep] the [adj] century | 66 |
|
| 4 | [v-ing] back [prep] the [adj] century | 41 |
|
| 5 | [vb -s] back [prep] the [adj] century | 39 |
|
| 6 | dating back [prep] the [adj] century | 29 |
|
| 7 | dates back [prep] the [adj] century | 27 |
|
| 8 | go back [prep] the [adj] century | 27 |
|
| 9 | goes back [prep] the [adj] century | 12 |
|
| 10 | [vb base] back [prep] the [adj] century | 12 |
|
| 11 | [vb pp] back [prep] the [adj] century | 12 |
|
| 12 | [verb] back [prep] the sixteenth century | 8 |
|
| 13 | [verb] back [prep] the sixteenth century | 8 |
|
| 14 | [verb] back [prep] the thirteenth century | 7 |
|
| 15 | [verb] back [prep] the nineteenth century | 7 |
|
| 16 | [verb] back [prep] the 13th century | 7 |
|
| 17 | [verb] back [prep] the thirteenth century | 7 |
|
| 18 | trace back [prep] the [adj] century | 7 |
|
| 19 | [verb] back [prep] the 13th century | 7 |
|
| 20 | traced back [prep] the [adj] century | 7 |
|
| 21 | [verb] back [prep] the nineteenth century | 7 |
|
| 22 | going back [prep] the [adj] century | 6 |
|
| 23 | [verb] back [prep] the twelfth century | 6 |
|
| 24 | date back [prep] the [adj] century | 6 |
|
| 25 | [verb] back [prep] the twelfth century | 6 |
|
| 26 | [verb] back [prep] the 14th century | 6 |
|
| 27 | [vb past] back [prep] the [adj] century | 6 |
|
| 28 | [verb] back [prep] the 14th century | 6 |
|
| 29 | [verb] back [prep] the eighteenth century | 6 |
|
| 30 | go back [prep] the [adj] century | 6 |
|
