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const counterWords = [
  "code",
  "repeat",
  "eat",
  "sleep",
  "code",
  "enjoy",
  "sleep",
  "code",
  "enjoy",
  "upgrade",
  "code",
];

function repeatCounter(array) {
  let counter = {}; // Declaro un objeto vacío
  for (let i = 0; i < array.length; i++) {
    if (array[i] in counter) {
      // Si el elemento del array está en mi objeto counter
      counter[array[i]]++; // Cojo ese elemento y le sumo 1
    } else {
      counter[array[i]] = 1; // Si no está le dejo un 1
    }
  }
  console.table(counter);
}

repeatCounter(counterWords);