| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] back [prep] the 13th [noun sg] | 5 |
|
| 2 | [vb -s] back [prep] the 13th century | 5 |
|
| 3 | dates back [prep] the 13th [noun] | 5 |
|
| 4 | [vb -s] back to the 13th [noun] | 5 |
|
| 5 | [vb -s] back [prep] the 13th century | 5 |
|
