| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of [noun pl] [v-ing] back | 26 |
|
| 2 | [prep] [noun pl] dating back | 13 |
|
| 3 | with [noun pl] [v-ing] back | 13 |
|
| 4 | [prep] [noun pl] going back | 12 |
|
| 5 | [prep] [noun pl] stretching back | 7 |
|
| 6 | in [noun pl] [v-ing] back | 5 |
|
