Simplify the following text for a Grade 4 native English-speaking person.
Original: In terms of the number of trophies won , Manchester United 's most successful decade was the 1990s ; the club won five league titles , four FA Cups , one League Cup , five Charity Shields ( one shared ) , one UEFA Champions League , one UEFA Cup Winners ' Cup , one UEFA Super Cup and one Intercontinental Cup .
Simplified: In 2008 they won the FIFA Club World Cup . They have won the FA cup 11 times , the UEFA Champions League 3 times , and the league cup 4 times .