| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] for the maintenance [prep] | 35 |
|
| 2 | [adj] for the maintenance of | 35 |
|
| 3 | responsible for the maintenance [prep] | 12 |
|
| 4 | essential for the maintenance [prep] | 11 |
|
| 5 | necessary for the maintenance [prep] | 10 |
|
