Matched context for principal and extra

The page lists matched contexts for principal and extra.

Share - principal	Share - extra	Phrase
6.21%	14.17%	{principal or extra} [importance] fuel
5.29%	4.54%	{principal or extra} [importance] component
8.83%	1.85%	{principal or extra} [importance] part
2.71%	1.54%	{principal or extra} [importance] passage
1.85%	2.67%	{principal or extra} [importance] valve
1.17%	3.17%	{principal or extra} [importance] injection