| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [noun pl] [v-ing] back | 51 |
|
| 2 | [noun] [noun pl] dating back | 17 |
|
| 3 | [noun] [noun pl] going back | 16 |
|
| 4 | [noun] [noun pl] stretching back | 5 |
|
