| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do research [prep] | 63 |
|
| 2 | doing research [prep] | 35 |
|
| 3 | to do research [prep] | 19 |
|
| 4 | do research on | 18 |
|
| 5 | do research in | 13 |
|
| 6 | do research for | 10 |
|
| 7 | done research [prep] | 9 |
|
| 8 | do research into | 8 |
|
| 9 | do research at | 5 |
|
