| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] at [adj] time | 668 |
|
| 2 | [adv prt] at [adj] time | 202 |
|
| 3 | back at [adj] [noun] | 87 |
|
| 4 | back [prep] [adj] time | 82 |
|
| 5 | back [prep] [adj] time | 82 |
|
| 6 | back at [adj] time | 11 |
|
| 7 | back at [adj] time | 11 |
|
