| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun sg] studies [prep] | 135 |
|
| 2 | series [prep] studies [prep] | 25 |
|
| 3 | series [prep] [noun sg] [prep] | 24 |
|
| 4 | series [prep] [noun sg] studies | 20 |
|
