| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] back [prep] the [num ord] | 251 |
|
| 2 | dating back [prep] the [adj] | 73 |
|
| 3 | date back [prep] the [num ord] | 72 |
|
| 4 | [v-ing] back [prep] the [num ord] | 68 |
|
| 5 | dating [adv] [prep] the [num ord] | 36 |
|
| 6 | dating back [prep] the [num ord] | 32 |
|
| 7 | dating back [prep] [art] [num ord] | 32 |
|
| 8 | dating [adv prt] [prep] the [num ord] | 32 |
|
| 9 | dating back [prep] the [num ord] | 32 |
|
