| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] back [prep] the [num ord] century | 113 |
|
| 2 | [vb -s] [adv] [prep] the [num ord] century | 55 |
|
| 3 | [vb -s] back [prep] the [num ord] [noun] | 50 |
|
| 4 | [vb -s] back [prep] [art] [num ord] century | 40 |
|
| 5 | [vb -s] back [prep] the [num ord] century | 40 |
|
| 6 | [vb -s] back [prep] the [adj] century | 40 |
|
| 7 | [vb -s] back [prep] [art] [num ord] century | 40 |
|
| 8 | [vb -s] back [prep] the [num ord] century | 40 |
|
