| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | after about [adj] a [noun] | 7 |
|
| 2 | after about [adj] a [noun sg] | 7 |
|
| 3 | after about [adj] a hour | 5 |
|
| 4 | after about [adj] a hour | 5 |
|
