| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] or [verb] | 3258 |
|
| 2 | [to-vb] or [vb infin] | 2917 |
|
| 3 | [to-vb] [conj] maintain | 191 |
|
| 4 | [verb] or maintain | 28 |
|
| 5 | [to-vb] or maintain | 24 |
|
