operation of knime

I’m a beginner in Knime and I have a tp to make is that someone can give me some informations on the operation of Knime, knowing that I must calculate the frequent element in the itemset using the apriori algorithm

Hi yassine,
You might want to have look at the Association Rule Learner that determines all frequent itemsets below a user-defined support threshold (see the node dialog for additional node settings).
Best, Thomas