| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who used [to-vb] [prep] the | 30 |
|
| 2 | who used [verb] [prep] the | 30 |
|
| 3 | who used [verb] in the | 8 |
|
| 4 | who used to work [prep] the | 7 |
|
| 5 | who used work [prep] the | 7 |
|
| 6 | who used [verb] for the | 5 |
|
| 7 | who used [verb] on the | 5 |
|
