| Share | Phrase |
|---|
| 27.46% | undertake ventilating [perform operation] |
| 17.35% | adaptively [manner] undertake |
| 13.27% | inventor [does] undertake |
| 11.03% | undertake correction [perform operation] |
| 9.06% | undertake modal can |
| 8.50% | undertake operation [perform operation] |
| 6.84% | undertake modal must |
| 6.44% | undertake control [perform operation] |