| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [adv] a [noun] | 2218 |
|
| 2 | [adv] a [noun] ago | 461 |
|
| 3 | [vb pp] a [noun] ago | 70 |
|
| 4 | [vb pp] [adv] [noun] ago | 17 |
|
