| Share | Phrase |
| 33.82% | stratified [structure] combustion |
| 16.12% | stratified [structure] charge |
| 12.93% | stratified [structure] engine |
| 7.24% | stratified [structure] mode |
| 5.01% | stratified [structure] mixture |
| 2.65% | stratified [structure] operation |
| 1.96% | stratified [structure] system |
| 1.67% | stratified [structure] state |
| 1.59% | stratified [structure] charging |
| 1.58% | stratified [structure] condition |
| 1.33% | stratified [structure] degree |
| 1.26% | stratified [structure] zone |
| 1.24% | stratified [structure] tumble |
| 1.23% | stratified [structure] burning |
| 1.04% | stratified [structure] control |
| 0.88% | stratified [structure] flow |
| 0.71% | stratified [structure] region |
| 0.70% | stratified [structure] fuel |
| 0.68% | stratified [structure] cloud |
| 0.64% | stratified [structure] process |
| 0.63% | stratified [structure] chamber |
| 0.55% | stratified [structure] principle |
| 0.44% | stratified [structure] stability |
| 0.38% | stratified [structure] manner |
| 0.37% | stratified [structure] area |
| 0.36% | stratified [structure] type |
| 0.35% | stratified [structure] distribution |
| 0.34% | stratified [structure] table |
| 0.30% | stratified [structure] injection |
| 0.29% | stratified [structure] layer |
| 0.28% | stratified [structure] form |
| 0.28% | stratified [structure] plug |
| 0.25% | stratified [structure] burn |
| 0.23% | stratified [structure] arrangement |
| 0.19% | stratified [structure] column |
| 0.17% | stratified [structure] valve |
| 0.12% | axially stratified |