| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been [prep] [noun] | 1385 |
|
| 2 | been developed [prep] [noun] | 136 |
|
| 3 | [vb past] been developed [prep] | 45 |
|
| 4 | [vb past] developed [prep] [noun] | 24 |
|
