| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] long hours [v-ing] | 13 |
|
| 2 | spend long hours [verb] | 12 |
|
| 3 | [v-ing] long hours [verb] | 5 |
|
| 4 | spending long hours [verb] | 5 |
|
