Matched context for difficult and sophisticated

The page lists matched contexts for difficult and sophisticated.

Share - difficult	Share - sophisticated	Phrase
3.88%	4.88%	{difficult or sophisticated} [difficulty] become
1.82%	8.02%	more {difficult or sophisticated}
0.51%	22.58%	{difficult or sophisticated} [difficulty] system
0.38%	9.43%	{difficult or sophisticated} [difficulty] control
0.37%	7.41%	{difficult or sophisticated} [difficulty] device