| Share | Phrase |
|---|
| 22.90% | unstable [time periodicity] become |
| 13.56% | unstable [time periodicity] state |
| 9.06% | unstable [time periodicity] combustion |
| 6.17% | unstable [time periodicity] cnt/judst |
| 5.56% | unstable [time periodicity] condition |
| 5.09% | unstable [time periodicity] level |
| 4.81% | temporarily unstable |
| 3.34% | unstable [time periodicity] process |
| 2.72% | unstable [time periodicity] make |
| 2.30% | unstable [time periodicity] operation |
| 1.59% | unstable [time periodicity] performance |
| 1.56% | unstable [time periodicity] status |
| 1.40% | unstable [time periodicity] render |
| 1.34% | unstable [time periodicity] determine |
| 1.21% | unstable in behavior |
| 1.18% | unstable [time periodicity] control |
| 1.11% | unstable [time periodicity] location |
| 1.09% | unstable [time periodicity] output |
| 1.06% | unstable [time periodicity] region |
| 0.96% | unstable [time periodicity] speed |
| 0.94% | unstable [time periodicity] behavior |
| 0.89% | unstable [time periodicity] pressure |
| 0.89% | unstable [time periodicity] situation |
| 0.84% | unstable [time periodicity] deem |
| 0.80% | unstable [time periodicity] position |
| 0.71% | unstable at level |
| 0.69% | unstable [time periodicity] manner |
| 0.69% | unstable [time periodicity] rotation |
| 0.69% | unstable [time periodicity] vehicle |
| 0.62% | unstable [time periodicity] flame |
| 0.60% | unstable [time periodicity] characteristic |
| 0.58% | unstable [reference] determine |
| 0.56% | unstable [time periodicity] movement |
| 0.53% | unstable [time periodicity] fuel |
| 0.53% | unstable [time periodicity] time |
| 0.43% | unstable [time periodicity] means |
| 0.43% | unstable [time periodicity] engine |
| 0.39% | more unstable |