| Share | Phrase |
|---|
| 18.96% | mixture richness |
| 11.64% | richness degree |
| 10.51% | richness rs |
| 8.45% | charge richness |
| 6.80% | richness decision |
| 4.69% | overall [completeness] richness |
| 3.66% | control richness [perform operation] |
| 3.33% | increase richness [perform operation] |
| 2.47% | fuel richness |
| 2.22% | mean [age] richness |
| 2.20% | increased [increase] richness |
| 2.11% | supply richness [perform operation] |
| 1.93% | gas richness |
| 1.91% | stoichiometric [physical/chemical] richness |
| 1.73% | required [importance] richness |
| 1.69% | vary richness [perform operation] |
| 1.64% | ratio richness |
| 1.58% | richness control |
| 1.46% | variation in richness |
| 1.26% | measure richness [perform operation] |
| 1.18% | determine richness [perform operation] |
| 1.17% | maximum [size] richness |
| 1.15% | regulate richness [perform operation] |
| 1.05% | correct richness [perform operation] |
| 0.94% | richness sensor |
| 0.93% | richness mixture |
| 0.85% | indicate richness [perform operation] |
| 0.83% | have richness [perform operation] |
| 0.82% | richness [does] remain |
| 0.70% | reduce richness [perform operation] |