Quantity label per specific page id

Hi!, i’d like to add a “quantity or per-night” label next to “quantity button” in a specific post-id or product category. It is possible?

If i add this to my functions.php it seems to work:

add_action( ‘woocommerce_before_add_to_cart_button’, ‘echo_qty_front_add_cart’ );

function echo_qty_front_add_cart() {
echo ‘<div class=”qty”>Quantity: </div>’;
}

But it adds it to all products pages. How can i specific a single category product or single pages id?

Thanks