| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] and maintain [det] | 12 |
|
| 2 | [to-vb] and maintain [det] | 10 |
|
| 3 | and maintain [det] [noun] | 9 |
|
| 4 | and maintain [det] [noun pl] | 6 |
|
