| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] back [prep] [art] | 9695 |
|
| 2 | [v-ing] back [prep] [art] | 1550 |
|
| 3 | heading [adv] [prep] [art] | 125 |
|
| 4 | head back [prep] [art] | 103 |
|
| 5 | heading [adv prt] [prep] [art] | 82 |
|
| 6 | heading back [prep] [art] | 36 |
|
| 7 | heading back [prep] [art] | 36 |
|
