| Share | Phrase |
|---|
| 21.89% | stratify mixture [perform operation] |
| 19.45% | stratify charge [perform operation] |
| 11.82% | stratify fuel [perform operation] |
| 9.44% | stratify in engine |
| 8.93% | stratify inside [perform operation] |
| 5.11% | method [does] stratify |
| 3.91% | stratify groove [perform operation] |
| 3.90% | stratify gas [perform operation] |
| 3.47% | stratify air [perform operation] |
| 3.14% | stratify ratio [perform operation] |
| 2.54% | provide for stratify |
| 2.26% | stratify chamber [perform operation] |
| 2.19% | stratify in chamber |
| 1.90% | time [temporal] stratify |