| Share | Phrase |
|---|
| 17.61% | unsatisfactory [amount] prove |
| 10.77% | unsatisfactory [amount] performance |
| 10.31% | unsatisfactory [amount] result |
| 9.38% | unsatisfactory [amount] become |
| 9.09% | unsatisfactory [amount] operation |
| 6.97% | unsatisfactory [amount] system |
| 6.60% | unsatisfactory [amount] make |
| 6.19% | unsatisfactory [amount] method |
| 6.12% | unsatisfactory [amount] combustion |
| 6.12% | unsatisfactory [amount] condition |
| 4.84% | unsatisfactory [amount] device |
| 3.56% | still unsatisfactory |
| 2.37% | generally unsatisfactory |