| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] a [noun sg] ago | 70 |
|
| 2 | [vb pp] a year ago | 31 |
|
| 3 | [vb pp] a year ago | 31 |
|
| 4 | [vb pp] a week ago | 11 |
|
| 5 | [vb pp] a week ago | 11 |
|
| 6 | [vb pp] a month ago | 6 |
|
| 7 | [vb pp] a fortnight ago | 6 |
|
| 8 | [vb pp] a fortnight ago | 6 |
|
| 9 | [vb pp] a month ago | 6 |
|
| 10 | [vb pp] a century ago | 5 |
|
| 11 | [vb pp] a while ago | 5 |
|
| 12 | [vb pp] a century ago | 5 |
|
| 13 | [vb pp] a while ago | 5 |
|
