Concordance for verb knock

The page lists top contexts for verb knock and their percentages (as applied to automotive subject domain).

Share	Phrase
28.60%	tendency [does] knock
28.46%	engine [does] knock
13.05%	knock by compare
12.00%	knock vibration [perform operation]
9.30%	knock means [perform operation]
3.41%	engine knock
2.61%	not knock
2.54%	fuel knock