| Share | Phrase |
|---|
| 10.92% | encounter difficulty [perform operation] |
| 10.11% | overcome difficulty [perform operation] |
| 5.48% | difficulty [does] arise |
| 3.75% | experience difficulty [perform operation] |
| 3.17% | present difficulty [perform operation] |
| 3.17% | obviate difficulty [perform operation] |
| 2.81% | difficulty with engine |
| 2.60% | eliminate difficulty [perform operation] |
| 2.42% | considerable [importance] difficulty |
| 2.29% | avoid difficulty [perform operation] |
| 2.27% | great [size] difficulty |
| 2.20% | solve difficulty [perform operation] |
| 2.19% | involve difficulty [perform operation] |
| 2.08% | alleviate difficulty [perform operation] |
| 2.08% | problem [is] difficulty |
| 1.74% | cause difficulty [perform operation] |
| 1.63% | pose difficulty [perform operation] |
| 1.59% | corrositivity difficulty |
| 1.59% | possible except difficulty |
| 1.39% | have difficulty [perform operation] |
| 1.18% | associate difficulty [perform operation] |
| 1.05% | not difficulty |
| 1.03% | technical [domain related] difficulty |
| 0.97% | lead to difficulty |
| 0.94% | difficulty [does] accompany |
| 0.92% | extreme [size] difficulty |
| 0.90% | suffer from difficulty |
| 0.90% | rise to difficulty |
| 0.83% | certain [certainty] difficulty |
| 0.81% | entail difficulty [perform operation] |
| 0.75% | prone to difficulty |
| 0.74% | handling difficulty |
| 0.74% | major [importance] difficulty |
| 0.70% | art difficulty |
| 0.70% | starting [chronology] difficulty |
| 0.69% | difficulty [does] obtain |
| 0.68% | practical [certainty] difficulty |
| 0.67% | processing difficulty |
| 0.66% | installation difficulty |
| 0.65% | particular [typicality] difficulty |
| 0.65% | difficulty [does] provide |
| 0.65% | create difficulty [perform operation] |
| 0.64% | difficulty with system |
| 0.64% | difficulty [does] maintain |
| 0.62% | serious [importance] difficulty |
| 0.60% | difficulty [does] occur |
| 0.60% | difficulty [does] achieve |
| 0.54% | difficulty [does] control |
| 0.52% | reduce difficulty [perform operation] |
| 0.52% | operational [functioning] difficulty |
| 0.52% | increase difficulty [perform operation] |
| 0.48% | difficulty [does] place |
| 0.48% | increasing [increase] difficulty |
| 0.44% | minimize difficulty [perform operation] |
| 0.43% | little [size] difficulty |
| 0.43% | only [degree] difficulty |
| 0.42% | substantial [importance] difficulty |
| 0.42% | sealing [purpose] difficulty |
| 0.39% | similar [similarity] difficulty |
| 0.39% | difficulty view |
| 0.39% | propose difficulty [perform operation] |
| 0.37% | present [chronology] difficulty |
| 0.36% | engine difficulty |
| 0.34% | difficulty [does] start |
| 0.33% | prior [chronology] difficulty |
| 0.32% | find difficulty [perform operation] |
| 0.32% | possible [certainty] difficulty |
| 0.30% | add difficulty [perform operation] |
| 0.29% | ignition difficulty |
| 0.29% | various [similarity] difficulty |
| 0.29% | difficulty [does] make |
| 0.29% | difficulty number |
| 0.28% | difficulty [does] connect |
| 0.28% | difficulty in operation |
| 0.26% | mechanical [functioning] difficulty |
| 0.25% | assembly difficulty |
| 0.24% | difficulty [does] use |
| 0.24% | difficulty [does] apply |
| 0.23% | additional [importance] difficulty |
| 0.23% | difficulty [does] form |
| 0.22% | provide difficulty [perform operation] |
| 0.21% | difficulty [does] produce |
| 0.21% | prevent difficulty [perform operation] |
| 0.16% | valve difficulty |
| 0.16% | control difficulty |
| 0.16% | describe difficulty [perform operation] |
| 0.15% | system difficulty |