java-base-maven/test1/src/main/java/Main02.java

import java.util.Scanner;

public class Main02 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str1 = scanner.nextLine().toLowerCase();
        String str2 = scanner.next().toLowerCase();
        int index = -1;
        int res = 0;
        while ((index = str1.indexOf(str2, index+1)) >= 0) {
            res++;
        }
        System.out.println(res);
    }
}