The FIFA Club World Cup was founded in 2000 and the first winner was Brazilian team Corinthians. Then this tournament suspended for four years. Since its resumption in 2005, CWC has become a fixture among the top clubs.
Here are the top 3 clubs of having most CWC titles so far:
Real Madrid 4 (2014, 2016, 2017, 2018)
Barcelona (2009, 2011, 2015)
Sport Club Corinthians Paulista (2000, 2012)