| Share | Phrase |
|---|
| 47.80% | advanced [difficulty] position |
| 12.69% | advanced [difficulty] timing |
| 5.06% | advanced [difficulty] system |
| 3.77% | advanced [difficulty] cylinder |
| 3.36% | advanced [difficulty] angle |
| 3.36% | advanced [difficulty] segment |
| 3.05% | advanced [difficulty] signal |
| 3.01% | fully [degree] advanced |
| 2.75% | advanced [difficulty] side |
| 1.83% | advanced [difficulty] opening |
| 1.58% | advanced [difficulty] technique |
| 1.52% | advanced [difficulty] technology |
| 1.45% | advanced [difficulty] ignition |
| 1.37% | advanced [difficulty] time |
| 1.34% | advanced [difficulty] engine |
| 1.07% | advanced [difficulty] chemistry |
| 1.07% | advanced [difficulty] value |
| 0.91% | advanced [difficulty] chassis |
| 0.91% | advanced [difficulty] phase |
| 0.75% | advanced [difficulty] method |
| 0.70% | advanced firing |
| 0.30% | more [degree] advanced |
| 0.23% | more advanced |