See the example on Ramzy ride project

slick total slide count.html

<!-- Slider counter structer -->
<div class="slide-count-wrap trck-count">
    <div class="prev"></div>
    <div class="next"></div>
    <span class="current"></span> /
    <span class="total"></span>
</div>

<script>
  
  function carousel_features(){
      //var slideCount = null;
      var totalSlideNumber = 0;
      $('#carousel-features .carousel-thumb').each(function(i){
          totalSlideNumber =  i + 1;
          totalSlideNumber < 10 ? totalSlideNumber = '0' + totalSlideNumber : totalSlideNumber;

      });
      $('.trck-count .current' ).text('01');
      $('.trck-count .total' ).text(totalSlideNumber);

  }
  carousel_features();

  $('#carousel-features').on('beforeChange', function(event, slick, currentSlide, nextSlide) {
      var getNumber = nextSlide + 1;
      getNumber < 10 ? getNumber = '0' + getNumber : getNumber;
      $('.trck-count .current' ).text(getNumber);
  });
</script>