| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | then centrifuge at [num] [noun] [prep] | 5 |
|
| 2 | then centrifuge at [num] [noun] for | 5 |
|
| 3 | then centrifuge at [num] [noun] [prep] | 5 |
|
| 4 | then centrifuge at [num] [noun] for | 5 |
|
