| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | date back [prep] the [adj] | 151 |
|
| 2 | [verb] back [prep] the last | 37 |
|
| 3 | date back [prep] the last | 6 |
|
| 4 | date [adv] [prep] the last | 6 |
|
| 5 | date back [prep] the last | 6 |
|
| 6 | date back [prep] [art] last | 6 |
|
| 7 | date back [prep] [art] last | 6 |
|
| 8 | date [adv prt] [prep] the last | 6 |
|
| 9 | date back [prep] the last | 6 |
|
