Matched context for apt and certain

The page lists matched contexts for apt and certain.

Share - apt	Share - certain	Phrase
7.58%	1.18%	{apt or certain} [certainty] engine
10.55%	0.35%	{apt or certain} [certainty] wheel
8.92%	0.14%	{apt or certain} [certainty] fuel
4.08%	0.12%	{apt or certain} [certainty] it