| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been developed [prep] a [noun sg] | 24 |
|
| 2 | has been developed [prep] a [noun] | 11 |
|
| 3 | have been developed by a [noun] | 8 |
|
| 4 | have been developed as a [noun] | 6 |
|
| 5 | had been developed [prep] a [noun] | 6 |
|
| 6 | have been developed [prep] a [noun] | 5 |
|
