Display Count of portfolio items in a certain portfolio Category

Hi!
Is there a way to display the count of portfolio items in a certain portfolio category using shortcode?
I added the code below in function.php file but i just learned that it can only count post categories and not the portfolio (custom type).
function category_post_count( $atts ) {
$atts = shortcode_atts( array(
‘category’ => null
), $atts );
$term = get_term_by( ‘slug’, $atts[‘category’], ‘category’);
return ( isset( $term->count ) ) ? $term->count : 0;
}
add_shortcode( ‘category_post_count’, ‘category_post_count’ );

Thank you in advance.