| Share | Phrase |
|---|
| 7.99% | prevent contamination [perform operation] |
| 7.83% | protect from contamination |
| 6.80% | contamination level |
| 4.95% | stick contamination [perform operation] |
| 4.79% | oil contamination |
| 4.10% | co contamination |
| 3.91% | sulfur [color] contamination |
| 3.83% | bearing contamination |
| 3.71% | protection against contamination |
| 3.63% | unacceptable [effectiveness] contamination |
| 3.02% | contamination problem |
| 2.96% | contamination degree |
| 2.70% | contamination possibility |
| 2.58% | coolant contamination |
| 2.54% | environmental [natural phenomenon] contamination |
| 2.49% | particulate contamination |
| 2.44% | reduce contamination [perform operation] |
| 2.43% | free of contamination |
| 2.42% | water contamination |
| 2.36% | atmospheric [natural phenomenon] contamination |
| 2.32% | fluid contamination |
| 2.03% | minimize contamination [perform operation] |
| 1.87% | plug contamination |
| 1.87% | remove contamination [perform operation] |
| 1.87% | possible [certainty] contamination |
| 1.81% | avoid contamination [perform operation] |
| 1.70% | fuel contamination |
| 1.26% | contamination signal |
| 1.09% | sensor contamination |
| 1.09% | surface contamination |
| 1.08% | air contamination |
| 1.01% | contamination [does] occur |
| 1.00% | contamination [does] require |
| 0.98% | amount contamination |
| 0.81% | cause contamination [perform operation] |
| 0.54% | not contamination |