| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] services [prep] | 528 |
|
| 2 | [prep] [prep] [be] | 250 |
|
| 3 | [prep] services [be] | 77 |
|
| 4 | services [prep] [be] | 66 |
|
