| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been [prep] a [noun] | 482 |
|
| 2 | [verb] been developed [prep] [noun] | 122 |
|
| 3 | [verb] been developed [prep] a | 44 |
|
| 4 | [verb] developed [prep] a [noun] | 35 |
|
| 5 | been developed [prep] a [noun] | 30 |
|
