| Share | Phrase |
|---|
| 35.87% | exercise care [perform operation] |
| 27.21% | exercise control [perform operation] |
| 6.91% | exercise modal must |
| 6.86% | exercise effect [perform operation] |
| 6.58% | exercise force [perform operation] |
| 6.34% | exercise function [perform operation] |
| 5.81% | exercise torque [perform operation] |
| 4.37% | exercise modal can |