| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | study of the [noun sg] of [noun pl] | 41 |
|
| 2 | study of the [noun] of [noun pl] | 34 |
|
| 3 | studies of the [noun] of [noun pl] | 18 |
|
| 4 | study of the [noun pl] of [noun pl] | 11 |
|
