| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] on for hours | 18 |
|
| 2 | go on for hours | 13 |
|
| 3 | [vb infin] on for hours | 8 |
|
| 4 | go on for hours | 6 |
|
| 5 | on for [adj] hours | 21 |
|
| 6 | on for [num] hours | 17 |
|
| 7 | on for three hours | 8 |
|
| 8 | on for three hours | 8 |
|
