count-occurrences-of-given-character.js

function countCharOccurances (text, character) {
  // convert input to string and split the string into an array of charaters
  let chars = String(text).split("")

  // if doesn't include, return 0
  if (!chars.includes(String(character))) {
    return 0
  } else {
    let count = 0
    
    // else, iterate through each chatacter
    for (let i = 0; i < chars.length; i++) {
      // if matches given character, increase count
      if (chars[i] === String(character)) count = count + 1
    }

    // return count at the end
    return count
  }
}

console.log(countCharOccurances('cat', 2))