| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | on [prep] a long [noun sg] | 50 |
|
| 2 | on for a long [noun sg] | 44 |
|
| 3 | on [prep] a long time | 39 |
|
| 4 | on [prep] a long period | 5 |
|
