| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [v-ing] [adv] at [art] back | 5 |
|
| 2 | [noun sg] [v-ing] at [art] back [prep] | 7 |
|
| 3 | [noun sg] [v-ing] at [art] back [prep] | 7 |
|
| 4 | [noun sg] [v-ing] at [art] back of | 6 |
|
| 5 | [noun sg] [v-ing] at [art] back of | 6 |
|
