| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [be] [prep] [noun] | 49 |
|
| 2 | could [adv] [be] achieved [prep] | 39 |
|
| 3 | [adv] [be] achieved [prep] [noun] | 25 |
|
| 4 | could [be] achieved [prep] [noun] | 16 |
|
