| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at it for a long | 10 |
|
| 2 | [vb past] at it for a long | 8 |
|
| 3 | look at it for a long | 6 |
|
| 4 | looked at it for a long | 5 |
|
| 5 | at it for a long [noun sg] | 11 |
|
| 6 | at it for a long [noun] | 11 |
|
| 7 | at it for a long time | 9 |
|
| 8 | at it for a long time | 9 |
|
