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+support = count(x)/count(total)
+
+confidence - если х, то скорей всего y = supp(x + y)/supp(x)
+
+lift - насколько зависят друг от друга = supp(x+y)/(supp(x) supp(y))
+1 независимы
+
+lift(a, b) = 1.25 -> +25% мощнее правила, что a просто покупают
+
+https://habr.com/ru/companies/ods/articles/353502/
+
+
+
+откидываем нечастые