| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back at [adj] [noun] | 87 |
|
| 2 | back [prep] head [noun] | 8 |
|
| 3 | back [prep] head [noun] | 8 |
|
| 4 | [adv] at head [noun] | 8 |
|
| 5 | back at head [noun] | 5 |
|
| 6 | back at head [noun] | 5 |
|
| 7 | [adv prt] at head [noun] | 5 |
|
