| Share | Phrase | 
|---|
| 6.76% | fuel  introduction | 
| 5.71% | air  introduction | 
| 4.98% | introduction   chamber | 
| 3.29% | introduction   port | 
| 2.91% | introduction   pipe | 
| 2.68% | permit introduction  [perform operation] | 
| 2.53% | mention in introduction | 
| 2.28% | introduction   system | 
| 2.18% | mixture  introduction | 
| 2.10% | fluid  introduction | 
| 2.06% | gas  introduction | 
| 1.98% | facilitate introduction  [perform operation] | 
| 1.76% | control introduction  [perform operation] | 
| 1.66% | describe in introduction | 
| 1.46% | mixture to introduction | 
| 1.41% | periodic [time periodicity] introduction | 
| 1.40% | introduction  [temporal] introduce | 
| 1.38% | allow introduction  [perform operation] | 
| 1.33% | introduction   passage | 
| 1.30% | fuel to introduction | 
| 1.23% | introduction  [connection] heat | 
| 1.18% | water  introduction | 
| 1.18% | means to introduction | 
| 1.18% | time introduction  [perform operation] | 
| 1.17% | pressure  introduction | 
| 1.13% | time after introduction | 
| 1.13% | assembly upon introduction | 
| 1.07% | prevent introduction  [perform operation] | 
| 1.05% | selective [typicality] introduction | 
| 1.05% | introduction   path | 
| 1.05% | introduction  [does] cause | 
| 1.02% | introduction   amount | 
| 0.99% | interrupt introduction  [perform operation] | 
| 0.90% | medium  introduction | 
| 0.89% | stage  introduction | 
| 0.82% | introduction   opening | 
| 0.82% | continue introduction  [perform operation] | 
| 0.81% | stop introduction  [perform operation] | 
| 0.79% | introduction   passageway | 
| 0.78% | material [domain related] introduction | 
| 0.78% | introduction   hole | 
| 0.78% | introduction   means | 
| 0.74% | delay introduction  [perform operation] | 
| 0.72% | charge  introduction | 
| 0.72% | introduction   way | 
| 0.69% | vacuum  introduction | 
| 0.67% | enable introduction  [perform operation] | 
| 0.66% | terminate introduction  [perform operation] | 
| 0.64% | specification  introduction | 
| 0.63% | air to introduction | 
| 0.62% | force  introduction | 
| 0.61% | block introduction  [perform operation] | 
| 0.60% | stream  introduction | 
| 0.55% | lead to introduction | 
| 0.55% | promote introduction  [perform operation] | 
| 0.55% | oil  introduction | 
| 0.54% | introduction  [does] displace | 
| 0.52% | introduction   determination | 
| 0.51% | effect introduction  [perform operation] | 
| 0.51% | uniform [similarity] introduction | 
| 0.48% | fresh [chronology] introduction | 
| 0.48% | pilot  introduction | 
| 0.47% | involve introduction  [perform operation] | 
| 0.46% | introduction   timing | 
| 0.46% | vapor  introduction | 
| 0.45% | dynamic [motion] introduction | 
| 0.44% | oxygen  introduction | 
| 0.44% | introduction  [purpose] provide | 
| 0.43% | tool  introduction | 
| 0.43% | means for introduction | 
| 0.42% | main [importance] introduction | 
| 0.40% | inhibit introduction  [perform operation] | 
| 0.38% | introduction  [does] take | 
| 0.38% | pulse  introduction | 
| 0.37% | introduction   rate | 
| 0.36% | achieve introduction  [perform operation] | 
| 0.36% | introduction   point | 
| 0.35% | datum  introduction | 
| 0.34% | introduction   circuit | 
| 0.34% | introduction  [does] create | 
| 0.34% | avoid introduction  [perform operation] | 
| 0.34% | introduction  [does] provide | 
| 0.34% | quantity  introduction | 
| 0.34% | introduction   device | 
| 0.33% | proper [accuracy] introduction | 
| 0.33% | carry out introduction  [perform operation] | 
| 0.32% | introduction   relate | 
| 0.31% | accomplish introduction  [perform operation] | 
| 0.31% | introduction  [does] prevent | 
| 0.30% | flow  introduction | 
| 0.29% | system  introduction | 
| 0.28% | amount  introduction | 
| 0.26% | control  introduction | 
| 0.25% | introduction  [does] allow | 
| 0.25% | fluid [state] introduction | 
| 0.24% | reduce introduction  [perform operation] | 
| 0.23% | introduction   valve | 
| 0.23% | introduction  [does] make | 
| 0.23% | introduction  [does] produce | 
| 0.21% | device  introduction | 
| 0.20% | require introduction  [perform operation] | 
| 0.19% | provide introduction  [perform operation] | 
| 0.19% | introduction   assembly | 
| 0.19% | comprise introduction  [perform operation] | 
| 0.18% | introduction   portion | 
| 0.16% | cause introduction  [perform operation] | 
| 0.15% | make introduction  [perform operation] | 
| 0.13% | include introduction  [perform operation] | 
| 0.09% | not  introduction |