| Share | Phrase |
| 13.66% | conditioning [importance] apparatus |
| 12.33% | conditioning [importance] means |
| 11.32% | conditioning [importance] circuit |
| 10.73% | conditioning [importance] assembly |
| 9.33% | air conditioning |
| 5.75% | conditioning [importance] arrangement |
| 5.75% | conditioning [importance] fuel |
| 5.51% | conditioning [importance] current |
| 5.51% | conditioning [importance] stage |
| 5.36% | conditioning [importance] unit |
| 3.93% | signal conditioning |
| 1.99% | feed conditioning |
| 1.87% | fuel conditioning |
| 1.60% | gas conditioning |
| 1.39% | conditioning apparatus |
| 1.21% | conditioning effect |
| 1.04% | engine conditioning |
| 0.86% | conditioning system |
| 0.75% | include conditioning [perform operation] |