| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun sg] of years [adv] [art] | 11 |
|
| 2 | a [noun sg] of [noun] ago [art] | 10 |
|
| 3 | a [noun sg] of [noun pl] ago [art] | 10 |
|
| 4 | [art] [noun sg] of years ago [art] | 5 |
|
| 5 | a [noun sg] of year ago [art] | 5 |
|
| 6 | a [noun sg] [prep] years ago [art] | 5 |
|
| 7 | a [noun] of years ago [art] | 5 |
|
