show some text in the checkout page, so that customers are aware of how shipping works.
//Add order notice on checkout page
\!h add_action( '__woocommerce_after_order_notes__', 'checkout_shipping_notice' ); //change the hook to the area you want it to appear
function checkout_shipping_notice() {
\!h echo '<p class="allow">__Please allow 5-10 business days for delivery after order processing.__</p>';
}