| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] back to the [num ord] | 51 |
|
| 2 | dates back to the [num ord] | 29 |
|
| 3 | goes back to the [num ord] | 16 |
|
| 4 | [vb -s] back to the 13th | 5 |
|
