| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | based [prep] research | 43 |
|
| 2 | based [prep] research | 43 |
|
| 3 | based on research | 37 |
|
| 4 | based on research | 37 |
|
| 5 | based upon research | 5 |
|
| 6 | based upon research | 5 |
|
