| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] concentrated on [noun] | 16 |
|
| 2 | have concentrated on [noun] | 13 |
|
| 3 | [vb base] concentrated on [noun sg] | 8 |
|
| 4 | [vb base] concentrated on [noun pl] | 6 |
|
