| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back [prep] [noun pl] [noun] | 22 |
|
| 2 | back [prep] [noun pl] [noun sg] | 16 |
|
| 3 | back to [noun pl] [noun] | 12 |
|
| 4 | back to [noun pl] [noun] | 12 |
|
| 5 | back [prep] basics [noun] | 5 |
|
