(JS) 문자, 단어, 동음이의어 갯수 세기

const str =
`반응형웹, 반응형 웹, Responsive, responsive web 웹표준
웹표준, 웹 표준, Web Standard, web Standard`;

const countChar = (char, str) => {
  const matchedChars = str.match(new RegExp(char, 'gmi'));
  return matchedChars ? matchedChars.length : 0;
};

console.log(countChar('웹', str)); // 5
console.log(countChar('웹표준', str)); // 2

let str =
`반응형웹, 반응형 웹, Responsive, responsive web 웹표준
웹표준, 웹 표준, Web Standard, web Standard`;

const homonym  = ['웹 표준', '웹표준', 'Web Standard'];

const countHomonym = (homonym, str) => {
  let cnt = 0;
  for(const word of homonym) {
    const regExp = new RegExp(word, 'gmi');
    const matchedWords = str.match(regExp);
    if(matchedWords) cnt += matchedWords.length;
  }
  
  return cnt;
};

console.log(countHomonym(homonym, str));