| Share | Phrase |
| 14.07% | liquid [state] propane |
| 11.77% | propane gas |
| 5.20% | fuel [is] propane |
| 5.05% | propane vapor |
| 4.15% | propane tank |
| 3.64% | vaporized propane |
| 3.39% | propane bottle |
| 3.25% | propane fuel |
| 3.19% | vaporize propane [perform operation] |
| 3.05% | inject propane [perform operation] |
| 2.97% | trimethylol propane |
| 2.87% | propane torch |
| 2.21% | propane propene |
| 2.12% | gaseous [state] propane |
| 1.93% | propane system |
| 1.70% | propane source |
| 1.47% | propane like fuel |
| 1.41% | propane blend |
| 1.40% | burn propane [perform operation] |
| 1.26% | store propane [perform operation] |
| 1.23% | consist propane [perform operation] |
| 1.21% | pump propane [perform operation] |
| 1.18% | propane [does] fuel |
| 1.17% | propane in air |
| 1.17% | propane [does] run |
| 1.16% | contain propane [perform operation] |
| 1.10% | propane liquid |
| 1.04% | propane ignition |
| 1.03% | supply propane [perform operation] |
| 0.88% | propane supply |
| 0.88% | include propane [perform operation] |
| 0.87% | use propane [perform operation] |
| 0.81% | pressurized [tightness] propane |
| 0.77% | propane pressure |
| 0.76% | deliver propane [perform operation] |
| 0.71% | propane [does] enter |
| 0.64% | receive propane [perform operation] |
| 0.64% | propane limit |
| 0.61% | utilize propane [perform operation] |
| 0.59% | propane line |
| 0.58% | propane engine |
| 0.53% | employ propane [perform operation] |
| 0.52% | propane chamber |
| 0.51% | propane flow |
| 0.51% | propane [does] vary |
| 0.49% | propane temperature |
| 0.46% | base propane [perform operation] |
| 0.37% | permit propane [perform operation] |
| 0.29% | prevent propane [perform operation] |
| 0.27% | propane valve |
| 0.22% | provide propane [perform operation] |
| 0.21% | not propane |
| 0.20% | propane [does] have |