| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] of groups of | 59 |
|
| 2 | of groups of [noun pl] | 40 |
|
| 3 | [noun] groups of [noun pl] | 31 |
|
| 4 | [noun] of of [noun pl] | 30 |
|
