| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have happened a long [noun] ago | 5 |
|
| 2 | have happened a long [noun] [adv] | 5 |
|
| 3 | have happened a long time [adv] | 5 |
|
| 4 | have happened a long [noun sg] [adv] | 5 |
|
| 5 | have happened a long time [adv] | 5 |
|
