题解 | #计算某字符出现次数#

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void async function () {
    // Write your code here
    let arrStr = []
    while(line = await readline()){
        arrStr.push(line)
    }
    let re1 = new RegExp(arrStr[1], 'ig')
    let result = arrStr[0].match(re1) || []
    console.log(result.length)
}()