def is_frequent_individual(itemset, dico, ds, minFrequency):
	"""
	Checks if the itemset contains only frequent items
	:param itemset: the itemset
	:param dico: dictionary containing the transactions
	:param ds: dataset
	:param minFrequency: the minimum frequency for the items
	:return: True if all items in itemset are frequent, False otherwise
	"""
	for e in itemset:
		support = len(dico[tuple([e])]) 
		frequency = support / ds.trans_num()
		if frequency < minFrequency:
			return False
	return True