Matched context for tract and duct

The page lists matched contexts for tract and duct.

Share - tract	Share - duct	Phrase
31.07%	5.11%	intake {tract or duct}
15.84%	2.90%	inlet {tract or duct}
23.11%	0.50%	induction {tract or duct}
8.94%	0.78%	exhaust [physical/chemical] {tract or duct}
4.62%	0.73%	gas {tract or duct}
11.41%	0.32%	suction {tract or duct}
4.98%	0.26%	engine {tract or duct}