Support estimation in frequent itemsets mining on Enriched Two Level Tree. - Clémentin Tayou Djamégni; William Kery Branston Ndemaze; Kenmogne Edith Belise; Hervé Maradona Nana Kouassi; Arnauld Nzegha Fountsop; Idriss Tetakouchom; Laurent Cabrel Tabueu Fotso (Inf. Syst., 2025)