| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] itself | 7122 |
|
| 2 | [to-vb] itself | 1177 |
|
| 3 | to maintain [pron] | 564 |
|
| 4 | to maintain [pn reflx] | 30 |
|
| 5 | maintain itself | 23 |
|
| 6 | to maintain itself | 10 |
|
