Matched context for flap and flapper

The page lists matched contexts for flap and flapper.

Share - flap	Share - flapper	Phrase
5.46%	38.69%	{flap or flapper} valve
1.31%	25.36%	{flap or flapper} door
1.57%	1.71%	{flap or flapper} member
1.31%	2.09%	{flap or flapper} [does] close
0.68%	1.60%	{flap or flapper} [does] move
0.73%	1.55%	air {flap or flapper}
0.79%	1.37%	have {flap or flapper} [perform operation]