| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] back on [adj] [noun] [prep] | 6 |
|
| 2 | look back on [adj] [noun] [prep] | 5 |
|
| 3 | [vb infin] back on [det] [noun] [prep] | 5 |
|
