| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have maintained | 298 |
|
| 2 | had maintain | 110 |
|
| 3 | have maintain | 91 |
|
| 4 | has maintain | 88 |
|
| 5 | have to maintain | 40 |
|
| 6 | have maintain | 21 |
|
| 7 | to have maintain | 16 |
|
| 8 | having maintain | 7 |
|
